how to keep category displayed?

[vladivlad007]

I have categories with hierarchy level 1, 2, 3 and 4.
So they are not all displayed (only up to level 2)

I used this technique to display categories (added module to article) and displaying only subcategories:

Make a standard Joomla article page with just CV category module published.

see example:
http://j2-vm.vladivlad.com/index.php/navijaky

However when I click on category, products are shown, but category on left panel obviously disappear.
How can I do that, so that category on left panel keeps showing even when it starts showing products?




BOOKS
   ROMANCE
   SCIFI
ELECTRONICS
   DVD
      GAMES
         PS3
         XBOX
      MUSIC
         Modern
         Classic
         Rock
      SOFTWARE
         for WIN
         for Mac
         for UX



and showing only this part:

MUSIC
         Modern
         Classic
         Rock     

[vladivlad007]

I forgot to mention: Joomla 2.5.9 + VM 2.0.18