How to hide subsections beyond 3 nestings on Bitrix?

Question

1C-Bitrix

Hello, please tell me how to hide subsections beyond 3 levels of nesting so that they are not displayed in the drop-down menu. Whatever I tried, I rummaged through all the settings.

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

<?if (!empty($arResult)):?>
<?global $useSeacrh?>
<div class="hidden-xs hidden-sm">
  <div class="navbar-collapse collapse">
    <ul class="nav navbar-nav navbar-left horizontal-menu" itemscope itemtype="http://www.schema.org/SiteNavigationElement">
      <?
      $previousLevel = 0;
      foreach($arResult as $arItem):?>

        <?if ($previousLevel && $arItem["DEPTH_LEVEL"] < $previousLevel):?>
          <?=str_repeat("</ul></li>", ($previousLevel - $arItem["DEPTH_LEVEL"]));?>
        <?endif?>

        <?if ($arItem["IS_PARENT"]):?>

          <?if ($arItem["DEPTH_LEVEL"] == 1):?>
            <li class="<? if ($arItem["SELECTED"]): ?>active<? else: ?>dropdown<? endif ?>"><a itemprop="url" href="<?=$arItem["LINK"]?>" class="dropdown-toggle"  data-hover="dropdown"><?=$arItem["TEXT"]?>&nbsp;<i class="fa fa-angle-down"></i></a>
              <ul class="dropdown-menu">
          <?else:?>
            <li class="dropdown-submenu"><a itemprop="url" href="<?=$arItem["LINK"]?>"><?=$arItem["TEXT"]?></a>
              <ul class="dropdown-menu">
          <?endif?>

        <?else:?>

          <?if ($arItem["PERMISSION"] > "D"):?>

            <?if ($arItem["DEPTH_LEVEL"] == 1):?>
              <li class="<? if ($arItem["SELECTED"]): ?>active<? else: ?>dropdown<? endif ?>"><a itemprop="url" href="<?=$arItem["LINK"]?>" class="dropdown-toggle"   data-close-others="true"><?=$arItem["TEXT"]?></a></li>
            <?else:?>
              <li class="<? if ($arItem["SELECTED"]): ?>active<? else: ?>dropdown<? endif ?>"><a itemprop="url" href="<?=$arItem["LINK"]?>"><?=$arItem["TEXT"]?></a></li>
            <?endif?>

          <?else:?>

            <?if ($arItem["DEPTH_LEVEL"] == 1):?>
              <li><a itemprop="url" href="" class="<?if ($arItem["SELECTED"]):?>root-item-selected<?else:?>root-item<?endif?>" title="<?=GetMessage("MENU_ITEM_ACCESS_DENIED")?>"><?=$arItem["TEXT"]?></a></li>
            <?else:?>
              <li><a itemprop="url" href="" class="denied" title="<?=GetMessage("MENU_ITEM_ACCESS_DENIED")?>"><?=$arItem["TEXT"]?></a></li>
            <?endif?>

          <?endif?>

        <?endif?>

        <?$previousLevel = $arItem["DEPTH_LEVEL"];?>
      <?endforeach?>
      
      <?//top search?>
      <?if($useSeacrh === 'Y'):?>
        <li class="dropdown dropdown-aux animate-click" data-animate-in="animated bounceInUp" data-animate-out="animated fadeOutDown" style="z-index:500;">
                <a itemprop="url" href="#" class="dropdown-form-toggle" data-toggle="dropdown"><i class="fa fa-search"></i></a>
                <ul class="dropdown-menu dropdown-menu-user animate-wr">
                    <li id="dropdownForm">
                        <div class="dropdown-form">
                            <form class="form-horizontal form-light p-10" role="form" method="get" action="<?=SITE_DIR?>search/">
                                <div class="input-group">
                                    <input type="text" class="form-control" placeholder="<?=GetMessage("MENU_SEARCH_PLACEHOLDER")?>" name="q">
                                    <span class="input-group-btn">
                                        <button class="btn btn-two" type="submit" name="s"><?=GetMessage("MENU_SEARCH_BUTTON")?></button>
                                    </span>
                                </div>
                            </form>
                        </div>
                    </li>
                </ul>       
          	</li>
      <?endif;?>
      
      <?if ($previousLevel > 1)://close last item tags?>
        <?=str_repeat("</ul></li>", ($previousLevel-1) );?>
      <?endif?>
    </ul>
  </div>
</div>

<div class="hidden-lg hidden-md">	
    <ul class="navbar-right mobile_menu">
      <?
      $previousLevel = 0;
      foreach($arResult as $arItem):?>

        <?if ($previousLevel && $arItem["DEPTH_LEVEL"] < $previousLevel):?>
          <?=str_repeat("</ul></li>", ($previousLevel - $arItem["DEPTH_LEVEL"]));?>
        <?endif?>

        <?if ($arItem["IS_PARENT"]):?>

          <?if ($arItem["DEPTH_LEVEL"] == 1):?>
            <li class="<? if ($arItem["SELECTED"]):?>selected<?endif?>">
              <a itemprop="url" href="<?=$arItem["LINK"]?>">
                <?=$arItem["TEXT"]?>								
              </a>
              <ul class="submenu">
          <?else:?>
            <li class="<? if ($arItem["SELECTED"]):?>selected<?endif?>">
              <a itemprop="url" href="<?=$arItem["LINK"]?>"><?=$arItem["TEXT"]?></a>
              <ul class="submenu">
          <?endif?>

        <?else:?>

          <?if ($arItem["PERMISSION"] > "D"):?>

            <?if ($arItem["DEPTH_LEVEL"] == 1):?>
              <li class="<? if ($arItem["SELECTED"]):?>selected<?endif?>">
                <a itemprop="url" href="<?=$arItem["LINK"]?>">
                  <?=$arItem["TEXT"]?>										
                </a>
              </li>
            <?else:?>
              <li class="<? if ($arItem["SELECTED"]):?>selected<?endif?>">
                <a itemprop="url" href="<?=$arItem["LINK"]?>">
                  <?=$arItem["TEXT"]?>										
                </a>
              </li>
            <?endif?>

          <?else:?>

            <?if ($arItem["DEPTH_LEVEL"] == 1):?>
              <li>
                <a itemprop="url" href="" class="<? if ($arItem["SELECTED"]):?>selected<?endif?>" title="<?=GetMessage("MENU_ITEM_ACCESS_DENIED")?>">
                  <?=$arItem["TEXT"]?>										
                </a>
              </li>
            <?else:?>
              <li>
                <a itemprop="url" href="" class="denied" title="<?=GetMessage("MENU_ITEM_ACCESS_DENIED")?>">
                  <?=$arItem["TEXT"]?>										
                </a>
              </li>
            <?endif?>

          <?endif?>

        <?endif?>

        <?$previousLevel = $arItem["DEPTH_LEVEL"];?>
      <?endforeach?>
      
      <?//top search?>
      <?if($useSeacrh === 'Y'):?>
        <li class="dropdown dropdown-aux animate-click" data-animate-in="animated bounceInUp" data-animate-out="animated fadeOutDown" style="z-index:500;">
                <a itemprop="url" href="<?=SITE_DIR?>search/" class="dropdown-form-toggle"><i class="fa fa-search"></i></a>
          	</li>
      <?endif;?>
      
      <?if ($previousLevel > 1)://close last item tags?>
        <?=str_repeat("</ul></li>", ($previousLevel-1) );?>
      <?endif?>
    </ul>	
</div>

<div class="menu-clear-left"></div>
<?endif?>

Answer 1

As far as I understand, the bitrix:menu.sections component generates items for the site menu in one of the .<menu_type_name>.menu_ext.php files.
This component has a DEPTH_LEVEL parameter. Use it.