In the main category view \components\com_viertuemart\views\category\tmpl\default.php I would like it to display each category along with child categories i.e.
Category 1 Category 2
--Subcat 1 --Subcat 1
--Subcat 2 --Subcat 2
--Subcat 3 --Subcat 3
rather than just the top level categories
So it is essentially like a tree view.