Bitrix, queries to the database?

Question

1C-Bitrix

There was a task to make a menu in Bitrix. In this static menu, it was necessary to grab the elements of the infoblock by the section url specified in the menu itself and display them in the submenu. I wrote such code in result_modifier.php

<? if (!defined('B_PROLOG_INCLUDED') || B_PROLOG_INCLUDED!==true) die();

$arFilter = Array('IBLOCK_ID'=>$IBLOCK_ID, 'GLOBAL_ACTIVE'=>'Y');
$db_list = CIBlockSection::GetList(Array($by=>$order), $arFilter, true);
while($ar_result = $db_list->GetNext())
{
  foreach ($arResult as $key => $arItem) {
    $test = explode('/', $arItem["LINK"]);
    if ($test[(count($test) - 2)] == $ar_result["CODE"]) {
      $arResult[$key]["CHILDREN"] = array();
      $arSelect = Array("ID", "NAME", "DETAIL_PAGE_URL");
      $arFilter = Array("IBLOCK_ID"=>$IBLOCK_ID, "ACTIVE"=>"Y", "SECTION_ID" => $ar_result["ID"]);
      $res = CIBlockElement::GetList(Array(), $arFilter, false, false, $arSelect);
      $i=0;
      while($ob = $res->GetNextElement())
      {
       $arFields = $ob->GetFields();
       	$arResult[$key]["CHILDREN"][$i]["NAME"] = $arFields["NAME"];
       	$arResult[$key]["CHILDREN"][$i]["DETAIL_PAGE_URL"] = $arFields["DETAIL_PAGE_URL"];
       	$i ++;
      }
    }
  }
}

But the senior developer said that there are 25 queries to the database and only two queries need to be made. I looked at debugging, 9 requests. I thought and thought and didn’t come up with it. How it is possible to optimize the code to reduce the number of queries to the database?