{% load mptt_tags %}
<ul class="arm_sections_menu root">
    {% recursetree sections %}
        <li>
            {% if section_view %}
                <a href='{% url section_view full_slug=node.full_slug %}'>{{ node.title }}</a>
            {% else %}
                {{ node.title }}
            {% endif %}
            {% if not node.is_leaf_node %}
                <ul class="children">
                    {{ children }}
                </ul>
            {% endif %}
        </li>
    {% endrecursetree %}
</ul>