Custom Menu Pane

category-topics.inc

<?php
$plugin = array(
  'single' => TRUE,
  'title' => t('Category Topic Pane'),
  'description' => t('A Pane showing the current node\'s children under the main menu, their descriptions, and their children'), 
  'category' => t('Category Topic'), 
  'render callback' => 'category_topics_pane_custom_pane_render',
  'admin info' => 'category_topics_pane_custom_pane_admin_info', 
  'hook theme' => 'category_topics',
);



/**
 * Run-time rendering of the body of the block (content type)
 * See ctools_plugin_examples for more advanced info
 */
function category_topics_pane_custom_pane_render($subtype, $conf, $args, $contexts) {

  $block = new stdClass();
  // initial content is blank

  $block->content = array(
    '#theme' => 'category_topics',
  );

  return $block;

}


/**
 * Implements hook_theme();
 */
function category_topics_theme() {

  $category_topics = array();

  $nodeid= '';
  //let's grab the node id
  if (arg(0) == 'node' && is_numeric(arg(1))) $nodeid = arg(1);

  // plug it into the menu system
  $path = 'node/'. $nodeid;
  $parent = menu_link_get_preferred($path, 'main-menu');

  //let's grab the first level
  $parameters = array(
    'active_trail' => array($parent['plid']),
    'only_active_trail' => FALSE,
    'min_depth' => $parent['depth']+1,
    'max_depth' => $parent['depth']+1,
    'conditions' => array('plid' => $parent['mlid']),
  );


  $children = menu_build_tree('main-menu', $parameters);
  foreach ($children as $item) {
     $second_level = array();

    //get the node ID
    $node_path = explode('/', $item['link']['link_path']);
    $nid = $node_path[1];

    $description = '';
    //get the description

    $node_wrapper = entity_metadata_wrapper('node', $nid);
    $description = $node_wrapper->field_short_desc->value();


    if($item['link']['has_children'] == 1) {
      $child_path = 'node/'. $nid;
      $child_parent = menu_link_get_preferred($child_path, 'main-menu');

      //let's grab the second level
      $child_parameters = array(
        'active_trail' => array($child_parent['plid']),
        'only_active_trail' => FALSE,
        'min_depth' => $child_parent['depth']+1,
        'max_depth' => $child_parent['depth']+1,
        'conditions' => array('plid' => $child_parent['mlid']),
      );

      $children_level_2 = menu_build_tree('main-menu', $child_parameters);
      foreach ($children_level_2 as $child){
        array_push($second_level, array(
          'name' => $child['link']['link_title'],
          'menu_link' => $child['link']['link_path'],
          ));
      }
    }
    $second_level_number = count($second_level);

    array_push($category_topics, array(
      'name' => $item['link']['link_title'],
      'menu_link' => $item['link']['link_path'],
      'description' => $description,
      'second-level-number' => $second_level_number,
      'links' => $second_level,
    ));
    

  }

  return array(
    'category_topics' => array(
      'template' => 'category-topics',
      'path' => drupal_get_path('module', 'category_topics') . '/templates',
      'variables' => array(
        'category_topics' => $category_topics,

      ),
    ),
  );


}

category-topics.tpl.php

<?php
/**
 * @file category-topics.tpl.php
 * Custom Category Topics Pane
 *
 * Variables available:
 * - $category_topics: an array of all menu items under the current node with a nested array of their menu items

 */

?>
<div class="category-list">
<?php foreach($category_topics as $category_topic): ?>


    <div class="category-list__category category-list__category--layout ">
      <div class="category-list__rule">

      </div>
      <div class="category-list__category__title">
        <?php print l($category_topic['name'], $category_topic['menu_link'], array('attributes' => array('class' => 'category-list__title-link'))); ?>


        </a>
      </div>
      <div class="category-list__description">
        <?php print t($category_topic['description']); ?>
        <?php print l('Learn More', $category_topic['menu_link'], array('attributes' => array('class' => 'category-list__learn-more'))); ?>
       


      </div>


      <?php if ($category_topic['second-level-number'] > 0): ?>
        <div class="category-list__links">
          <?php if ($category_topic['second-level-number'] < 5): ?>

            <?php foreach($category_topic['links'] as $link): ?>
              <?php print l($link['name'],$link['menu_link'], array('attributes' => array('class' => 'category-list__link')));?>
            <?php endforeach; ?>

          <?php else : ?>
            <?php for ($i = 1; $i <= 3; $i++): ?>
              <?php print l($category_topic['links'][$i]['name'],$category_topic['links'][$i]['menu_link'], array('attributes' => array('class' => 'category-list__link')));?>
            <?php endfor; ?>
            <?php print l('View All', $category_topic['menu_link'], array('attributes' => array('class' => 'category-list__link category-list__link--all'))); ?>


          <?php endif; ?>  <!--end if larger than 5 and else-->
        </div>


      <?php endif; ?>  <!--end if category links exists-->

    </div>



<?php endforeach; ?>

</div>