custom walker

gistfile1.php

<?php  
/**
 * Custom Menu Walker - Special Walker classes that manipulate the menus.
 *
 * WordPress uses a special “Walker” class that iterates over each data record and then displays this 
 * record accordingly. The cool thing about that is that we can simply create our own custom walker extending 
 * that PHP class. That way we dont need to care about fetching the stuff from the database or preparing the 
 * data arrays. We only need to extend the part of the wordpress code that outputs the list.
 * 
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU 
 * General Public License version 2, as published by the Free Software Foundation.  You may NOT assume 
 * that you can use any other version of the GPL.
 *
 * 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.
 *
 * @package CustomMenuWalker
 * @version 0.1
 * @author Cristian Antohe <cristian@cozmoslabs.com>
 * @copyright Copyright (c) 2008 - 2011, Cristian Antohe
 * @link 
 * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */

 
/**
 * Custom Menu Walker class to output menu descriptions
 * The walker now checks if a description is set, and if thats the case it wraps the description into 
 * a span tag and appends it to the navigation title.
 * @since 0.1
 * @return string Output of the breadcrumb menu.
 */

class description_walker extends Walker_Nav_Menu
{
      function start_el(&$output, $item, $depth, $args)
      {
           global $wp_query;
           $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

           $class_names = $value = '';

           $classes = empty( $item->classes ) ? array() : (array) $item->classes;

           $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
           $class_names = ' class="'. esc_attr( $class_names ) . '"';

           $output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';

           $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
           $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
           $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
           $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

           $prepend = '<strong>';
           $append = '</strong>';
           $description  = ! empty( $item->description ) ? '<span>'.esc_attr( $item->description ).'</span>' : '';

           if($depth != 0)
           {
                     $description = $append = $prepend = "";
           }

            $item_output = $args->before;
            $item_output .= '<a'. $attributes .'>';
            $item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
            $item_output .= $description.$args->link_after;
            $item_output .= '</a>';
            $item_output .= $args->after;

            $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
            }
}

/**
 * Custom Menu Walker class to list children of the current menu item
 * @since 0.1
 * @return string Output of the breadcrumb menu.
 */

class current_children_only_walker extends Walker_Nav_Menu
{
      function start_el(&$output, $item, $depth, $args)
      {
           global $wp_query;
           $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

           $class_names = $value = '';

           $classes = empty( $item->classes ) ? array() : (array) $item->classes;

           $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );
           $class_names = ' class="'. esc_attr( $class_names ) . '"';

           $output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';

           $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
           $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
           $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
           $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

           $prepend = '<strong>';
           $append = '</strong>';
           $description  = ! empty( $item->description ) ? '<span>'.esc_attr( $item->description ).'</span>' : '';

		   echo '<pre>';
		   print_r($item);
		   echo '</pre>';
		   echo '<div style="height:50px; background:#000; clear:both;"></div>';
		   
		   
		   if (($depth != 0)){
			
				$item_output = $args->before;
				$item_output .= '<a'. $attributes .'>';
				$item_output .= $args->link_before .apply_filters( 'the_title', $item->title, $item->ID );
				//$item_output .= $description.$args->link_after;
				$item_output .= '</a>';
				$item_output .= $args->after;

				$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );		   
		   }



       }
}