Magento:Display current category and sub categories within current category on layered navigation

Today we will see how to “Display current category and sub categories within current category on layered navigation” , In Magento Suppose you have below categories structure

• Category 1
  • Category 1a
  • Category 1b
  • Category 1c
    • Category 1c1
    • Category 1c2
•  Category 2
  • Category 2a
  • Category 2b

Now when user id on Category 1c2 page, in layered left navigation it will display Shop By category strcutre including Category 1 and Category 2 and everything inside it.

If you want to filter your layered left navigation so that it only display the the structure of from Root parent category(Category 1 in our case) and all sub categories within this parent category. So in our example like if you wan to display left navigation like below(note category 2 is hidden)

• Category 1a
• Category 1b
• Category 1c
  • Category 1c1
  • Category 1c2

Below is the code you can use to filter,

<?php $currentCategory = Mage::registry("current_category"); ?>

<?php $path = $currentCategory->getPath(); $ids = explode('/', $path); ?>

<?php $_helper = Mage::helper('catalog/category') ?>

<?php $_categories = $_helper->getStoreCategories() ?>

<div class="block block-right-nav block-yt-layered-nav">

 <div class="block-layered-nav-inner">

 <div class="block-title">

<strong>

<span><?php echo $this->__('Categories'); ?></span>

</strong>

 </div>

 <div class="block-content clearfix">

<?php if (count($_categories) > 0): ?>

 <ul id="yt_sidenav" class="dropdow-nav">



 <?php foreach($_categories as $_category): ?>

 <?php if (in_array($_category->getId(),$ids)): ?>

<?php echo $this->drawItem($_category) ?>

<?php endif; ?>

 <?php endforeach ?>

 </ul>

<?php endif; ?>

 <script type="text/javascript">

 decorateList('yt_sidenav')

</script>

 </div>

 <?php echo $this->getChildHtml('topLeftLinks'); ?>

 </div>

</div>

Basically what we are doing here, that we are getting current category path(getPath())  and spiting it in to array by ‘/’ and before displaying category inside each loop we are comparing the current category index id is within the array, if so display category else don’t display

Hope this helps…Happy Coding!!!!