{if isset($parent_content)}
  <p><a href="{$parent_content.CONTENT_LINK}"><strong>{$parent_content.CONTENT_TITLE}</strong></a></p>
  <ul>
    {foreach name=aussen item=content_data from=$sub_content}
    <li>
      <a href="{$content_data.CONTENT_LINK}">{$content_data.CONTENT_TITLE}</a>
    </li>
    {/foreach}
  </ul>
{/if}