Class zu einer Widget hinzufügen

<?php
/**
 * Plugin Name: WP Sidebar Login
 * Plugin URI: http://onlinewebapplication.com/2012/07/wp-sidebar-login.html
 * Description: This plugin used to easily add an ajax enabled wordpress login widget to your site's sidebar.
 * Version:       2.13
 * Author:        Pankaj Jha
 * Author URI:    http://onlinewebapplication.com/
 * License:       GNU General Public License, v2 (or newer)
 * License URI:  http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */
/*  Copyright 2011 Pankaj Jha (onlinewebapplication.com)


    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation using version 2 of the License.


    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.


    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


load_plugin_textdomain('sblogin', false    , 'wp-sidebar-login/I18n/');
if (is_admin()) include( WP_PLUGIN_DIR . '/wp-sidebar-login/admin.php' );
/*Compatible with WordPress 3.6*/
/* Call via function */
function sidebarlogin( $args = '' ) {
    
    if (!is_array($args)) parse_str($args, $args);
    
    $defaults = array(
        'before_widget'=>'',
        'after_widget'=>'',
        'before_title'=>'<h5>',
        'after_title'=>'</h2>'
    );
    $args = array_merge($defaults, $args);
    
    widget_wp_sidebarlogin($args);
}


/* The widget */
function widget_wp_sidebarlogin($args) {
    global $user_ID, $current_user;
    
    /* To add more extend i.e when terms came from themes - suggested by dev.xiligroup.com */
    /* 2.1 version Issue fixed in 2.0 */
    $defaults = array(
        'thelogin'=>'',
        'thewelcome'=>'',
        'theusername'=>__('Username:','sblogin'),
        'thepassword'=>__('Password:','sblogin'),
        'theremember'=>__('Remember me','sblogin'),
        'theregister'=>__('Register','sblogin'),
        'thepasslostandfound'=>__('Password Lost and Found','sblogin'),
        'thelostpass'=>    __('Lost your password?','sblogin'),
        'thelogout'=> __('Logout','sblogin')
    );
    
    $args = array_merge($defaults, $args);
    extract($args);        
    
    get_currentuserinfo();


    if ($user_ID != '') {

<?php 
     if ( has_nav_menu('mainNav') ){ 
   ?>
    <!-- #CatNav -->  
    <div id="catnav" class="secondary">    
        <?php wp_nav_menu(array('theme_location' => 'mainNav','container'=> '','menu_id'=> 'catmenu','menu_class'=> 'catnav  container clearfix','fallback_cb' => 'false','depth' => 3)); ?>
            <div id="login_box" class="menu_login_box">
                <?php sidebarlogin(); ?>
    </div></div>
    <!-- /#CatNav -->  
    <?php }