The following code modifies the Catalog List template to do one of the following:
* If the user clicks a category link and that category has subcategories, those subcategories will be displayed on the Catalog List template as links.
* If the user clicks a category or subcategory link that does not have any categories, the Catalog List will display a list of product search results.
You can modify this code to show images as subcategory links as well. 🙂