gistfile1.txt

{% for category, articles in categories %}
    <h2><a href="{{ SITEURL }}/{{ category.url }}">{{ category }}</a></h2>
    <ul>
    {% for article in articles %}
        <li><a href="{{ SITEURL }}/{{ article.url }}">{{ article }}</a></li>
    {% endfor %}
    </ul>
{% endfor %}