Список хайлоадблоков в системе

use Bitrix\Main\Loader;
use Bitrix\Highloadblock as HL;

Loader::IncludeModule('highloadblock');

$arHL = array();
$rsData = HL\HighloadBlockTable::getList(array(
    "select" => array("*"),
    "order" => array("NAME" => "asc")
));
while($arRes = $rsData->Fetch())
{
    $arHL[$arRes["ID"]] = $arRes["NAME"]." (".$arRes["ID"].")";
}