remove li class & id for menu items and pages list

Question

Example of WordPress default CSS class output:

&l         


        

Answer 1

this is an addition on top of Richard answer.

in case you want to change the current-menu-item class to something else.

        add_filter('nav_menu_css_class', 'my_css_attributes_filter', 100, 1);
        add_filter('nav_menu_item_id', 'my_css_attributes_filter', 100, 1);
        function my_css_attributes_filter($var) {
            if(is_array($var)){
                $varci= array_intersect($var, array('current-menu-item'));
                $cmeni = array('current-menu-item');
                $selava   = array('selectedmenu');
                $selavaend = array();
                $selavaend = str_replace($cmeni, $selava, $varci);
            }
            else{
                $selavaend= '';
            }
        return $selavaend;
        }