Как сделать select из разделов инфоблока?

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<select name="forma" onchange="location = this.options[this.selectedIndex].value;">
   <option>Выберите</option>
   
   <?foreach($arResult["SECTIONS"] as $arSection):?>
      <option value="<?=$arSection["SECTION_PAGE_URL"]?>#page"><?=$arSection["NAME"]?></option>
   <?endforeach;?>
</select>
 

 <?
  $res = CIBlockSection::GetList(
     Array("LEFT_MARGIN"=>"ASC"), 
     Array("IBLOCK_ID"=>6, "ACTIVE"=>"Y", "GLOBAL_ACTIVE"=>"Y"), 
     true,
     Array("ID", "NAME", "DESCRIPTION", "UF_STR")
  );
  while($arSection = $res->GetNext())
  {
      echo $arSection['ID'].'-'.$arSection['NAME'].'-'.$arSection['DESCRIPTION'].'-'.$arSection["UF_STR"].'<br --="">';
  };
?>