<?
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/header.php");
$APPLICATION->SetTitle("Title");
?>
<section class="sect sect-foto-video-list">
<div class="content oth dis-fl fl-colnw jsc-flst alit-flst">
</div>
</section>
<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/footer.php");?>$SECTION=CIblockSection::GetList......
$i=0;
$arr=[];
foreach($SECTION as $SECTION_ID=>$SECTION_ARR){
$arr[$i]=$SECTION_ID;
$i++;
}
$id=$arr[$i-1];