{function name=categories_tree}
        {if $categories}
            {if $level == 1}
                <ul class="dropdown-menu">
                {else}
                <ul class="dropdown-menu sub-menu">
            {/if}
                {foreach $categories as $c}
                    {if $c->visible}
                        {if $c->subcategories && $c->has_children_visible}
                            <li class="dropdown {if $category->id == $c->id}active{/if}"><a href="{$lang_link}catalog/{$c->url}" class="if-click trigger" aria-haspopup="true" data-category="{$c->id}">{$c->name|escape} <span class="glyphicon glyphicon-menu-down" aria-hidden="true"></span></a>
                                {categories_tree categories=$c->subcategories level=$level + 1}
                            </li>
                        {else}
                            <li{if $category->id == $c->id} class="active"{/if}>
                                <a href="{$lang_link}catalog/{$c->url}" data-category="{$c->id}">{$c->name|escape}</a>
                            </li>
                        {/if}
                    {/if}
                {/foreach}
            </ul>
        {/if}
    {/function}
    {categories_tree categories=$categories level=1}