Меню: Как быть если <? echo print_r($arResult); ?> не содержит ID разделов?

Array
(
    [0] => Array
        (
            [TEXT] => Обувь
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=17
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 0
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 1
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 1
        )

    [1] => Array
        (
            [TEXT] => Женская обувь
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=18
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 1
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [2] => Array
        (
            [TEXT] => Мужская обувь
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=19
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 2
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [3] => Array
        (
            [TEXT] => Кроссовки
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=20
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 3
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [4] => Array
        (
            [TEXT] => Аксессуары
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=21
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 4
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [5] => Array
        (
            [TEXT] => Бытовая техника
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=22
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 5
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 1
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 1
        )

    [6] => Array
        (
            [TEXT] => Кухонные электроприборы
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=23
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 6
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [7] => Array
        (
            [TEXT] => Холодильники, морозильные камеры
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=24
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 7
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [8] => Array
        (
            [TEXT] => Вентиляторы, пылесосы, кондиционеры
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=25
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 8
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [9] => Array
        (
            [TEXT] => Телевизоры
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=26
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 9
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [10] => Array
        (
            [TEXT] => Продукты
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=27
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 10
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 1
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 1
        )

    [11] => Array
        (
            [TEXT] => Кондитерские изделия
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=28
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 11
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [12] => Array
        (
            [TEXT] => Бакалея
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=30
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 12
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [13] => Array
        (
            [TEXT] => Молочные
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=31
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 13
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [14] => Array
        (
            [TEXT] => Сборка компьютеров
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=32
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 14
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 1
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 1
        )

    [15] => Array
        (
            [TEXT] => Компьютеры
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=33
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 15
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [16] => Array
        (
            [TEXT] => Комплектующие
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=34
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 16
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 2
                )

            [DEPTH_LEVEL] => 2
            [IS_PARENT] => 
        )

    [17] => Array
        (
            [TEXT] => Тара
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=35
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 17
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

    [18] => Array
        (
            [TEXT] => Сигареты
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=36
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 18
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

    [19] => Array
        (
            [TEXT] => Инвентарь
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=37
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 19
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

    [20] => Array
        (
            [TEXT] => Услуги
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=38
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 20
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

    [21] => Array
        (
            [TEXT] => Мебель
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=39
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 21
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

    [22] => Array
        (
            [TEXT] => Бонусные комплекты
            [LINK] => /pages/xml_catalog/index.php?SECTION_ID=40
            [SELECTED] => 
            [PERMISSION] => X
            [ADDITIONAL_LINKS] => Array
                (
                )

            [ITEM_TYPE] => U
            [ITEM_INDEX] => 22
            [PARAMS] => Array
                (
                    [FROM_IBLOCK] => 1
                    [IS_PARENT] => 
                    [DEPTH_LEVEL] => 1
                )

            [DEPTH_LEVEL] => 1
            [IS_PARENT] => 
        )

)

<?php
$str = "/pages/xml_catalog/index.php?SECTION_ID=17";
$url = parse_url($str);
$arr = array();
$ar = parse_str($url['query'], $arr);

print '<pre>'; print_r($arr); print '</pre>';
?>

Array
(
    [SECTION_ID] => 17
)