Форум

$rsSections = CIBlockSection::GetList($arOrder, $arFilter, false, array(
 "ID",
 "DEPTH_LEVEL",
 "NAME",
 "SECTION_PAGE_URL",
 "PICTURE",
 "SORT",
 "IBLOCK_SECTION_ID",
 //"UF_COLOR",
));
if($arParams["IS_SEF"] !== "Y")
 $rsSections->SetUrlTemplates("", $arParams["SECTION_URL"]);
else
 $rsSections->SetUrlTemplates("", $arParams["SEF_BASE_URL"].$arParams["SECTION_PAGE_URL"]);
  $arSectionIndex = array(); // индексный массив
  $arSectionForSort = array(); // массив вида [parent section id][section id] = сорт , для сортировки
while($arSection = $rsSections->GetNext())
{
    $arSectionForSort[intval($arSection["IBLOCK_SECTION_ID"])][$arSection["ID"]] = $arSection["SORT"];

    $arSectionIndex[$arSection["ID"]] = array(
  "ID" => $arSection["ID"],
  "DEPTH_LEVEL" => $arSection["DEPTH_LEVEL"],
  "~NAME" => $arSection["~NAME"],
  "~SECTION_PAGE_URL" => $arSection["~SECTION_PAGE_URL"].(isset($arParams['ADD_PARAM_URL'])?$arParams['ADD_PARAM_URL']:''),
  "PICTURE" => $arSection["PICTURE"],
  //"COLOR" => $arSection["UF_COLOR"],
 );
 $arResult["ELEMENT_LINKS"][$arSection["ID"]] = array();
}

if(!function_exists("setSectionOrder")) {
    function setSectionOrder($index, $arSectionForSort, $arSectionIndex, &$arResult) {
      if(isset($arSectionForSort[$index])) {
        asort($arSectionForSort[$index]); // сортируем
        foreach ($arSectionForSort[$index] as $sid => $sort) {
          $arResult["SECTIONS"][] = $arSectionIndex[$sid];
          setSectionOrder($sid, $arSectionForSort, $arSectionIndex, $arResult);
        }
      }
    }
  }
  setSectionOrder(0, $arSectionForSort, $arSectionIndex,$arResult);
$this->EndResultCache();