Категории как меню с веткой

{if (!$folders_shared.0._level&&count($folders_shared)>1)||($folders_shared.0._level&&count($folders_shared))}
    <nav class="shop-folders-wrap">
        <ul class="shop-folders menu-default">
            {foreach from=`$folders_shared2` item="e" key="k" name="foo"}

                {if $e._level}

                    {if $k}
                        {if $e._level > $prev_level}
                                <ul>
                            {else}
                                </li>
                            {section name="close_tags" start=`$e._level` loop=`$prev_level`}
                                </ul>
                                </li>
                            {/section}
                        {/if}
                    {/if}

                    {if $e._level==1}
                        <li class="{if $e._right-$e._left>1}has{/if}{if $e._left<=$folder._left && $e._right>=$folder._right} opened{/if}"><a href="{get_seo_url uri_prefix=$shop2.uri mode="folder" alias=$e.alias}">{$e.folder_name|htmlspecialchars}</a>
                    {else}
                        <li class="{if $e._right-$e._left>1}has{/if}{if $e._left<=$folder._left && $e._right>=$folder._right} opened{/if}"><a href="{get_seo_url uri_prefix=$shop2.uri mode="folder" alias=$e.alias}">{$e.folder_name|htmlspecialchars}</a>
                    {/if}

                    {assign var="prev_level" value=`$e._level`}

                {/if}

            {/foreach}
            </li>
        </ul>
        {section name="close_tags" start=1 loop=`$prev_level`}
            </li>
            </ul>
        {/section}
    </nav>
{/if}