Adding class atribute to wp_nav_menu ul

Question

Update: this was caused by the fact that i didn't have a menu created in the menu page.

I want to add a class to the ul of wp_nav_menu. I tried this code:

<?php

$defaults = array(
    'menu_class'      => 'menu',
    'items_wrap'      => '<ul id="%1$s" class="%2$s">%3$s</ul>',
);

wp_nav_menu( $defaults );

?>

According to wordpress codex changing the menu from 'menu_class' => 'menu', should change the class of the ul, but instead it changes the class of the div wrapping the ul.

<div class="this class is changed"><ul><li class="page_item page-item-2"><a href="http://domain.tld/">Sample Page</a></li></ul></div>

Answer 1

menu_class is indeed what changes the ul class. What's happening there is you didn't set which menu to use:

• wp-admin/nav-menus.php?action=locations