Time to recycle this idea and discard the useless plugin from the website.
]]>added the plugin but no results
]]>inserted menu in template:
<?php wp_nav_menu( array('menu' => 'hoofd' )); ?>
created menu via wordpress appearance -> menu’s
inserted children underneath mainmenu item
checked the top level checkbox
installed plugin
activated plugin
no result.
]]>Forget this.
]]>