function hide_user_columns($columns) { unset($columns['username']); unset($columns['role']); return $columns; } add_filter('manage_users_columns', 'hide_user_columns'); function disable_theme_functionality() { // global $submenu; unset($submenu['themes.php'][5]); // define('DISALLOW_FILE_EDIT', true); } add_action('admin_menu', 'disable_theme_functionality');