Как получить первый элемент массива?

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<div>
<ul>
<?
$CURRENT_DEPTH=$arResult["SECTION"]["DEPTH_LEVEL"]+1;
foreach($arResult["SECTIONS"] as $arSection):
   if($CURRENT_DEPTH<$arSection["DEPTH_LEVEL"])
      echo "<ul>";
   elseif($CURRENT_DEPTH>$arSection["DEPTH_LEVEL"])
      echo str_repeat("</ul>", $CURRENT_DEPTH - $arSection["DEPTH_LEVEL"]);
   $CURRENT_DEPTH = $arSection["DEPTH_LEVEL"];
?>
   <li><a href="<?=$arSection["SECTION_PAGE_URL"]?>"><?=$arSection["NAME"]?></a>
   
   <?
   $items = GetIBlockElementList("2", $arSection["ID"], Array("SORT"=>"ASC"), 1); 
   $arItem = $items->GetNext() 
   echo "ELEMENT_ID: ".$arItem["ID"]";
   ?>
   
   </li>
<?endforeach?>
</ul>
</div>

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<div>
<ul>
<?
$CURRENT_DEPTH=$arResult["SECTION"]["DEPTH_LEVEL"]+1;
foreach($arResult["SECTIONS"] as $arSection):
   if($CURRENT_DEPTH<$arSection["DEPTH_LEVEL"])
      echo "<ul>";
   elseif($CURRENT_DEPTH>$arSection["DEPTH_LEVEL"])
      echo str_repeat("</ul>", $CURRENT_DEPTH - $arSection["DEPTH_LEVEL"]);
   $CURRENT_DEPTH = $arSection["DEPTH_LEVEL"];
?>
   <li><a href="<?=$arSection["SECTION_PAGE_URL"]?>"><?=$arSection["NAME"]?></a>
   
   <?
   $items = GetIBlockElementList("2", $arSection["ID"], Array("SORT"=>"ASC"),1); 
   $arItem = $items->GetNext();
   echo "ELEMENT_ID: ".$arItem["ID"];
   ?>
</li>
<?endforeach?>
</ul>
</div>

Array
(
    [0] => Array
        (
            [ID] => 2
            ...
            [NAME] => ЖЕНСКАЯ ОДЕЖДА
            
    [1] => Array
        (
            [ID] => 3
            ...
            [NAME] => Демисезонная
            ...

    [2] => Array
        (
            [ID] => 4
            ...
            [NAME] => Пуховики
           ...

    [3] => Array
        (
            [ID] => 1
            ...
            [NAME] => МУЖСКАЯ ОДЕЖДА
            ...

    [4] => Array
        (
            [ID] => 5
           ...
            [NAME] => Демисезонная
            ...

    [5] => Array
        (
            [ID] => 6
           ...
            [NAME] => Пуховики
            ...
/