Настройка трехуровневого меню

[Гість]

Добрый день, дорогие форумчане! Есть меню вот такого типа:

Нужно сделать подкатегории, которые идут списком, третьим уровнем меню.
Вот код меню:

<div class="container">
<div class="row menu-line">
<div class="col-sm-12 col-md-7 col-md-push-3"><?php echo $search; ?></div>
<div class="col-sm-6 col-sm-push-6 col-md-2 col-md-push-3"><?php echo $cart; ?></div>
<div class="col-sm-6 col-sm-pull-6 col-md-3 col-md-pull-9">
<?php if ($categories) { ?>
<nav id="menu" class="btn-group btn-block">
<button type="button" class="btn btn-danger btn-block dropdown-toggle" data-toggle="dropdown">
<i class="fa fa-bars"></i>
<?php echo $text_category; ?>
</button>
<ul id="menu-list" class="dropdown-menu">
<?php foreach ($categories as $category) { ?>
<?php if ($category['children']) { ?>
<li>
<span class="toggle-child">
<i class="fa fa-plus plus"></i>
<i class="fa fa-minus minus"></i>
</span>
<a class="with-child" href="<?php echo $category['href']; ?>">
<i class="fa fa-angle-right arrow"></i>
<?php echo $category['name']; ?>
</a>
<?php if ($category['column'] < 2) { ?>
<?php $col_class = 'col-md-12'; ?>
<?php $box_class = 'box-col-1'; ?>
<?php $cols_count = 1; ?>
<?php } elseif ($category['column'] == 2) { ?>
<?php $col_class = 'col-md-6'; ?>
<?php $box_class = 'box-col-2'; ?>
<?php $cols_count = 2; ?>
<?php } else { ?>
<?php $col_class = 'col-md-4'; ?>
<?php $box_class = 'box-col-3'; ?>
<?php $cols_count = 3; ?>
<?php } ?>
<div class="child-box <?php echo $box_class; ?>">
<div class="row">
<?php $i = 0; ?>
<?php foreach ($category['children'] as $child) { ?>
<div class="<?php echo $col_class; ?>">
<div class="child-box-cell">
<h5>
<?php if($child['children2']) {?>
<span class="toggle-child2">
<i class="fa fa-plus plus"></i>
<i class="fa fa-minus minus"></i>
</span>
<?php } ?>
<a href="<?php echo $child['href']; ?>" class="<?php if($child['children2']) {echo 'with-child2';}?>"><span class="livel-down visible-xs-inline">↳</span><?php echo $child['name']; ?></a></h5>
<?php if($child['children2']) {?>
<ul class="child2-box">
<?php foreach ($child['children2'] as $child2) { ?>
<li><a href="<?php echo $child2['href']; ?>"><span class="livel-down">↳</span><?php echo $child2['name']; ?></a></li>
<?php } ?>
</ul>
<?php } ?>
</div>
</div>
<?php $i++; ?>
<?php if (($i == $cols_count) &($i != 1)) { ?>
<div class="clearfix visible-md visible-lg"></div>
<?php $i = 0; ?>
<?php } ?>
<?php } ?>
</div>
</div>
</li>
<?php } else { ?>
<li><a href="<?php echo $category['href']; ?>"><?php echo $category['name']; ?></a></li>
<?php } ?>
<?php } ?>
<?php if ($add_category_menu_toggle) {?>
<?php foreach ($add_category_menu as $item) { ?>
<li><a href="<?php echo $item['link'][$language_id]; ?>"><?php echo html_entity_decode($item['title'][$language_id], ENT_QUOTES, 'UTF-8'); ?></a></li>
<?php } ?>
<?php }?>
</ul>
</nav>
<div id="menuMask"></div>
<?php } ?>
</div>
</div>
</div>