{% for node,structure in drilldown|tree_info %}
{% if structure.new_level %}<ul><li>{% else %}</li><li>{% endif %}
   {% ifequal node category %}<strong>{{ node.name }}</strong>
   {% else %}<a href="{{ node.get_absolute_url }}">{{ node.name }}</a>
   {% endifequal %}
   {% for level in structure.closed_levels %}</li></ul>{% endfor %}
{% endfor %}