{if:$product_tree_is_open,eq,1}
<div class="cat_tree">
  <ul class="cat_tree_ul">
    {for:$i,0,$tree_u}
    {if:$tree[$i]['parent'],eq,0}
    <li>
      <div><a href="{$C_ROOT}?product_{$tree[$i]['id']}_0_0.html">{$tree[$i]['name']}</a></div>
      <ul>
        {for:$j,0,$tree_u}
        {$id=$tree[$i]['id']}
        {if:$id,eq,$tree[$j]['parent']}
        <li>
          <div><a href="{$C_ROOT}?product_{$tree[$j]['id']}_0_0.html">{$tree[$j]['name']}</a></div>
        </li>
        {/if}
        {/for}
      </ul>
    </li>
    {/if}
    {/for}
  </ul>
</div>
{/if}