Category module?

Question

opencart

Hi, tell me how to do it right, I’m making a theme for OpenCart and I have a category module displayed on the main page, it needs to be implemented so that parent categories are displayed when you click on the desired category, child categories are displayed, this is how I will do it. But there is a problem in the product card to display all categories? how can I write my own module or can I check if this is the main page, display one if this is not the main page, display another module

Answer 1

It's easier to check.