How to show category siblings?

Question

I have a Magento based website. In my product page I need to show related categories regarding the category the product fall into.

For example suppose the category structure A- has three child categories B,C and D. Where C has a product than on this product page i need to show B and D as a related category.

Is there is any way to achieve this.

Thanks in advance.

Answer 1

Let's say that you already have the current category in the variable $category. This piece of code should give you all the (active) category siblings.

$siblings = Mage::getModel('catalog/category')->getCollection()->setStoreId(Mage::app()->getStore()->getId());
$siblings->addAttributeToSelect('*')
        ->addAttributeToFilter('parent_id', $category->getParentId()) //siblings have the same parent as the current category
        ->addAttributeToFilter('is_active', 1)//get only active categories
        ->addAttributeToFilter('entity_id', array('neq'=>$category->getId()))//exclude current category
        ->addAttributeToSort('position');//sort by position

Now you can loop through the siblings and list them:

<?php foreach ($siblings as $sibling): ?>
    <a href="<?php echo $sibling->getUrl();?>"><?php echo $sibling->getName();?></a><br />
<?php endforeach;?>