You can use this technique to give the impression of "categories of topics". For every category, you'll do a for loop of all topics and render the ones that have the proper category code in their topic description (as defined by you).

gistfile1.html

<h2>Support Center Categories</h2>

<h3>Quick Start Guide</h3>

{% for topic in topics %}
  <ul>
    {% if topic.desc contains "[QSG]" %}
      <li><a href="{{ topic.public_url }}">{{ topic.name }}</a> (#{{ topic.id }})</li>
    {% endif %}
  </ul>
{% endfor %}

<hr>

<h3>Advanced User Guides</h3>

{% for topic in topics %}
  <ul>
    {% if topic.desc contains "[AUG]" %}
      <li><a href="{{ topic.public_url }}">{{ topic.name }}</a> (#{{ topic.id }})</li>
    {% endif %}
  </ul>
{% endfor %}