Hi Guys. So what I'm trying to do for one of my products is have a shop section. On the Side-nav I have the shop collapsible-header and that works marvellously, but we different products under the shop so what I want to do is list the different type of products which is also a collapsible-header and when opened it lists different products under that sub-section. An example I can give would be:

Shop (collapsible-header)
Shoes (collapsible-header)
Brand Name
Brand Name
Brand Name
Brand Name
Shirts (collapsible-header)
Brand Name
Brand Name
Brand Name
Brand Name
Pants (collapsible-header)
Brand Name
Brand Name
Brand Name
Brand Name

Is there any way that we can do this? Thank you.