<?php
if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();
global $APPLICATION;
$aMenuLinksExt = $APPLICATION->IncludeComponent("bitrix:menu.sections", "", Array(
        "IBLOCK_TYPE"   =>   "catalog",
        "IBLOCK_ID"   =>   CATALOG_IBLOCK_ID,
        "SECTION_URL"   =>   "/catalog/#SECTION_CODE_PATH#/",
        "DEPTH_LEVEL"   =>   "5",
        "CACHE_TYPE"   =>   "A",
        "CACHE_TIME"   =>   "3600"
    )
);

$aMenuLinks = array_merge($aMenuLinks, $aMenuLinksExt);