{php}$columns = \load_columns();{/php}
<ul class="nav nav-tabs clearfix mb-md">
    <li class="{if $column.parent_id==0}active{/if}" role="presentation"><a href="{$columns[$column.parent_id]['url']|default=$column.url}">{$columns[$column.parent_id]['name']|default=$column.name}</a></li>
    {if $column.parent_id} 
    {foreach $columns[$column.parent_id]['child'] as $v}
    <li class="{if $column.id==$v.id}active{/if}" role="presentation"><a href="{$v.url}">{$v.name}</a></li>
    {/foreach} 
    {else} 
    {if isset($columns[$column.id]['child'])} 
    {foreach $columns[$column.id]['child'] as $v}
    <li class="{if $column.id==$v.id}active{/if}" role="presentation"><a href="{$v.url}">{$v.name}</a></li>
    {/foreach} 
    {/if}
    {/if}
</ul>