nested breadcrumbs

gistfile1.aw

<!-- start breadcrumbs -->
<? if ( isset($category) && $category instanceof Shop_Category ): 
  $parent_categories = $category->get_parents(true);
?>
  <ol class="breadcrumbs">
    <? foreach ($parent_categories as $parent_category): ?>
      <li class="<?= $parent_category->id == $category->id ? 'last' : null ?>">
        <? if ($parent_category->id != $category->id): ?><a href="<?= $parent_category->page_url('/category') ?>"><? endif ?>
        <?= h($parent_category->name) ?>
        <? if ($parent_category->id != $category->id): ?></a><? endif ?>
      </li>
      <? if ( $parent_category->id != $category->id ): ?>
        <li>&rarr;</li>
      <? endif ?>
    <? endforeach ?>
  </ol>
<? elseif (isset($product)):
  $product_categories = $product->category_list->objectArray;  

  function sort_product_categories($a, $b, $c='front_end_sort_order')
  {
     if ($a->$c == $b->$c) return 0;
     return ($a->$c < $b->$c) ? 1 : -1;
  }
  
  usort ($product_categories, 'sort_product_categories');
  $parent_categories = $product_categories[0]->get_parents(true);
?>
  <ol class="breadcrumbs">
    <? foreach ($parent_categories as $parent_category): ?>
      <li>
        <a href="<?= $parent_category->page_url('/category') ?>"><?= h($parent_category->name) ?></a>
      </li>
        <li>&rarr;</li>
    <? endforeach ?>
    <li class="last"><?= h($product->name) ?></li>
  </ol>  
<? elseif( isset($manufacturer) && $manufacturer): ?>​
  <ol class="breadcrumbs">
    <li><a href="<?= root_url('/manufacturer') ?>">Manufacturers</a></li>
    <li>&rarr;</li>
    <li><? if(isset($category_id)): ?><a href="<?= root_url('/manufacturer/'.$manufacturer->url_name) ?>"><? endif ?>
        <?= $manufacturer->name ?>
        <? if(isset($category_id)): ?></a><? endif ?>
    </li>
    <? if(isset($category_id)): ?>
      <li>&rarr;</li>
      <? $category = Shop_Category::create()->find($category_id); ?>
      <li><?= $category->name ?></li>
    <? endif ?>
  </ol>
<? endif ?>
<!-- end breadcrumbs -->