Question

I want to implement something that would delete the empty categories and sub categories if there are no products in them.

There may be 100s of categories.So I don’t want to use backend for this.

I am in trouble please help me.

I am referring this link Hide Empty Categories but this is only hiding parent categories from navigation bar even if it’s sub categories have products in them.

Answer 1

Here is one way to delete empty categories…

$categoryCollection = Mage::getModel('catalog/category')->getCollection()
    ->addFieldToFilter('level', array('gteq' => 2))
;

foreach($categoryCollection as $category) {
    if ($category->getProductCount() === 0) {
        $category->delete();
    }
}

This will delete the categories – not simply hide them

---

EDIT

To answer the following posted in a comment:

"Could you please share a link of some tutorial or weblink.I am weak in creating custom modules". 

see here

You would be better just creating a script for this simple task. Here is a nice resource to explain how to bootstrap Magento for your script to run.