Highlight active Admin Menu when added though add_menu_page
add_filter( ‘parent_file’, ‘parent_file_hover’ ); function parent_file_hover( $parent_file ) { global $pagenow; if ( $pagenow == ‘post.php’) $parent_file = “post.php?post={$_REQUEST[‘post’]}&action=edit”; elseif($pagenow == ‘post-new.php’) $parent_file = “post-new.php?post_type={$_REQUEST[‘post_type’]}”; return $parent_file; }