active els

\Bitrix\Main\Loader::includeModule('iblock');
$dbSec = CIBlockElement::GetList([],['IBLOCK_ID' => 6]);
$bs = new CIBlockElement;
$cnt = 0;
while($ob = $dbSec->GetNext()){
  $bs->Update($ob['ID'], ['ACTIVE' => 'Y']);
    $cnt++;
}
echo $cnt;