Marian - menu 3 levels

menu.tpl

<nav class="primary-nav">
    <div class="mobile-adapter">{{translations.Com_Categories}}</div>
    <ul>
        {% for gn in menu.Nodes -%}
            <li>{{ gn | A }}
                {% if gn.Groups == empty -%}
                {% else -%}
                    <ul>
                        {% for gnn in gn.Groups -%}
                            <li>
                                {{ gnn | A }}
                                {% else -%}
                                    <ul>
                                        {% for gnnn in gn.Groups -%}
                                            <li>
                                                {{ gnnn | A }}
                                            </li>
                                        {% endfor -%} 
                                    </ul>
                                {% endif -%}
                            </li>
                        {% endfor -%} 
                    </ul>
                {% endif -%}
            </li>
        {% endfor -%}
    </ul>
</nav>