Listing sub-categories on a category page with category images.

This tutorial is going to show you one of the ways to list sub-categories on category pages of your Magento store. In order to display thumbnails of subcategories and their names on your category pages:
1:-In your Magento admin go to CMS -> Static Blocks
2:-Click “Add New Block” at the top right.
3:-Create a new static block as follows:
Block Title: Sub Category Listing
Identifier: subcategory_listing
Status: Enabled
Content:
{{block type="catalog/navigation" template="catalog/navigation/subcategory_listing.phtml"}}