One structure section for multiple menu's (navigations) I want to use one structure section for multiple menu's (navigations). So I want all pages under topmenu in the topmenu (header) and I want all pages in the bottommenu in a menu in the footer. How can I accomplish this most easily in my twig file?
This is something i've used, it should work for you, the only downside to it is there being a hardcoded id.

{% set nav = craft.entries.section('yourStructureSection') %}

{% set headerItems = nav.descendantOf(TopMenuId) %}

{% set footerItems = nav.descendantOf(BottomMenuId) %}


So you would just replace TopMenuId with the entry id of Topmenu and BottomMenuId with the entry id of Bottommenu

Then you will be able to loop through each nav :)

Edit

&lt;nav&gt;
 {% nav entry in craft.entries.section('contentPages').descendantOf(13) %} 
    &lt;li&gt; &lt;a href="{{ entry.url }}"&gt;{{ entry.title }} &lt;/a&gt;
        {% ifchildren %}
            &lt;ul&gt; {% children %} &lt;/ul&gt; 
        {% endifchildren %}
    &lt;/li&gt; 
 {% endnav %}
&lt;/nav&gt;