Custom Menu widget with description

custom-menu-links-widget.php

<?php
/*
Plugin Name: Custom Menu with Description Widget
Plugin URI: http://agentevolution.com
Description: Links from a custom menu in the sidebar including description
Author: Agent Evolution
Version: 1.0

Notes: This takes the WordPress Custom Menu Widget and adds a call to a custom walker that will display the menu link description.
Does not override original Custom Menu widget so you can have one with description and one without.
Forked from: https://gist.github.com/FStop/3882358 from Gabriel Luethje (@FStop)

*/

/*
 * Append the native Walker, using the description.
 *
 * @see http://wordpress.stackexchange.com/q/14037/
 * @author toscho, http://toscho.de
 */
class Description_Walker extends Walker_Nav_Menu
  {
      function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
      parent::start_el($output, $item, $depth, $args);
      $output .= sprintf('&nbsp;<span class="link-description">%s</span>', esc_html($item->description));
      }
  }

// Create the widget. This is basically a copy of the WP code, taken from /wp-includes/default_widgets.php
class LinksWidget extends WP_Widget
{

  function __construct() {
    $widget_ops = array( 'description' => __('Use this widget to add one of your custom menus as a widget including the description.') );
    parent::__construct( 'nav_menu_desc', __('Custom Menu with Description'), $widget_ops );
  }
 
  function widget($args, $instance) {
    // Get menu

    $nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false;

    if ( !$nav_menu )
      return;

    $instance['title'] = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );

    echo $args['before_widget'];

    if ( !empty($instance['title']) )
      echo $args['before_title'] . $instance['title'] . $args['after_title'];

    wp_nav_menu( array( 'fallback_cb' => '', 'menu' => $nav_menu, 'walker' => new Description_Walker) ); // calling the new walker so we have descriptions

    echo $args['after_widget'];
  }
 
  function update( $new_instance, $old_instance ) {
    $instance['title'] = strip_tags( stripslashes($new_instance['title']) );
    $instance['nav_menu'] = (int) $new_instance['nav_menu'];
    return $instance;
  }
 
  function form( $instance ) {
    $title = isset( $instance['title'] ) ? $instance['title'] : '';
    $nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';

    // Get menus
    // $menus = get_terms( 'nav_menu', array( 'hide_empty' => false ) );
    $menus = wp_get_nav_menus( array( 'orderby' => 'name' ) );

    // If no menus exists, direct the user to go and create some.
    if ( !$menus ) {
      echo '<p>'. sprintf( __('No menus have been created yet. <a href="%s">Create some</a>.'), admin_url('nav-menus.php') ) .'</p>';
      return;
    }
    ?>
    <p>
      <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>
      <input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" />
    </p>
    <p>
      <label for="<?php echo $this->get_field_id('nav_menu'); ?>"><?php _e('Select Menu:'); ?></label>
      <select id="<?php echo $this->get_field_id('nav_menu'); ?>" name="<?php echo $this->get_field_name('nav_menu'); ?>">
    <?php
      foreach ( $menus as $menu ) {
        $selected = $nav_menu == $menu->term_id ? ' selected="selected"' : '';
        echo '<option'. $selected .' value="'. $menu->term_id .'">'. $menu->name .'</option>';
      }
    ?>
      </select>
    </p>
    <?php
  }
 
}

add_action( 'widgets_init', create_function('', 'return register_widget("LinksWidget");') );

// repeat for more widgets


?>