Hi again, tnx for your reply.
This is the output I get. The menu structure only contains pages:
<ul id="custom-nav" class="custom-nav"><li id="menu-item-322" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-322"><a rel="Test" href="https://localhost/weer-in-zweden">weer-in-zweden</a></li>
<li id="menu-item-326" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-326"><a href="https://localhost/zweden-fotos">zweden-fotos</a></li>
<li id="menu-item-328" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-328"><a href="https://localhost/zweedse-kroon">zweedse-kroon</a>
<ul class="sub-menu">
<li id="menu-item-327" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-327"><a href="https://localhost/evenementen">evenementen</a></li>
</ul>
</li>
</ul>
If I navigate to one of the pages in the menu it doesn’t output the additional classes.