Show all categories and sub-categories all the time

[prestatent]

Prestashop 1.5.4.1 on windows 7 running on localhost.

 

Hi

 

I have several categories and sub-categories setup. What I would like to do is when I select a sub-category from a menu option from the top-menu, all sub-categories of the category are shown in the layered navigation block.

 

For example:

 

Category 1:

- Sub-Category 1

- Sub-Category 2

- Sub-Category 3

 

If I select Sub-Category 3 from the menu above, I would like to see all the sub-categories within the parent category shown in the layered-navigation block as well as all other categories and sub-categories.

 

In other words, I want to show all of the categories and sub-categories all of the time regardless of the category or sub-category I choose.

 

Is this possible?

 

Regards

David