Простое меню Битрикс.

<ul class="navbar-nav">
        <? foreach ($arResult as $arItem) {
            if ($arParams["MAX_LEVEL"] === 1 && $arItem["DEPTH_LEVEL"] > 1) {
                continue;
            } 
            $targetAttr = isset($arItem['PARAMS']['TARGET']) ? ' target="' . $arItem['PARAMS']['TARGET'] . '"' : '';
            ?>
            <li class="nav-item<?=$arItem["SELECTED"] ? ' selected' : ''?>">
                <a class="nav-link" aria-current="page" href="javascript:void(0)"<?=$targetAttr?>><?=$arItem["TEXT"]?></a>
            </li>
        <? } ?>
    </ul>

$APPLICATION->IncludeComponent(
    "bitrix:menu",
    "top",
    [
        "ROOT_MENU_TYPE" => "top",
        "MENU_CACHE_TYPE" => "N",
        "MENU_CACHE_TIME" => "3600",
        "MENU_CACHE_USE_GROUPS" => "Y",
        "MENU_CACHE_GET_VARS" => "",
        "MAX_LEVEL" => "1",
        "CHILD_MENU_TYPE" => "top",
        "USE_EXT" => "N",
        "DELAY" => "N",
        "ALLOW_MULTI_SELECT" => "N",
    ],
    false
); 

<? if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED !== true) {
    die();
}
/**
 * @global object $APPLICATION
 * @var array $arResult
 * @var array $arParams
 */
?>

<? if (!empty($arResult)) : ?>
    <ul class="menu">
        <?
        // Фильтрация элементов меню по максимальному уровню вложенности.
        $menuItems = array_filter($arResult, static function ($item) use ($arParams) {
            return !($arParams["MAX_LEVEL"] === 1 && $item["DEPTH_LEVEL"] > 1);
        });

        foreach ($menuItems as $arItem) :
            // Экранирование выводимых данных.
            $link = htmlspecialchars($arItem["LINK"]);
            $text = htmlspecialchars($arItem["TEXT"]);
            $class = $arItem["SELECTED"] ? 'selected' : '';
            $targetAttr = isset($arItem['PARAMS']['TARGET']) ? ' target="' . $arItem['PARAMS']['TARGET'] . '"' : '';
            ?>
            <li>
                <a href="<?=$link?>" class="<?=$class?>"<?=$targetAttr?>>
                    <?=$text?>
                </a>
            </li>
        <? endforeach; ?>
    </ul>
<? endif; ?>