Custom Post type menu highlighted in the archive/post
You have it almost right. Try the following: function add_active_classes($classes = array(), $menu_item = false){ global $wp_query; if(in_array(‘current-menu-item’, $menu_item->classes)){ $classes[] = ‘current-menu-item’; } if ( $menu_item->title == ‘product’ && is_post_type_archive(‘product’) ) { $classes[] = ‘current-menu-item’; } if ( $menu_item->title== ‘product’ && is_singular(‘product’) ) { $classes[] = ‘current-menu-item’; } return $classes; } add_filter( ‘nav_menu_css_class’, ‘add_active_classes’, 10, … Read more