Multi level Liquid Menu | Adobe Business Catalyst

{module_menu render="collection" menuId="1725685" template="" collection="menu1"}
<ul>
{% if menu1.items %}
{% for i in menu1.items %}
<li class="{{i.CSS class name}}"><a href="{{i.url}}">{{i.label}}</a>
{% if i.items %}
<ul class="dropdown">
{% for j in i.items %}
<li><a href="{{j.url}}">{{j.label}}</a></li>
{% endfor %}
</ul>
{% endif %} </li>
{% endfor %}
{% endif %}
</ul>