Add Category class for all subcategories

[m3442a]

Hello,

hope somebody can help me. I try to add a div class to a category and this need to be inherit for all subcategories. Example

<div class="{if category->id == '1' || $category->id_parent == '1'}cat_a{/if}"</div>

But this just add the class for the category self and the first subcategories, not the sub-subcategories and the levels below.

How can add the class for all level depth inside the category 1?

 

Here another example:

CAT A

    SUBCAT A 1

        SUB-SUBCAT A 1 1

        SUB-SUBCAT A 1 2

 

CAT B

    SUBCAT B 1

        SUB-SUBCAT B 1 1

        SUB-SUBCAT B 1 2

 

For all this i would to put into header tpl. this logic. I open the categories with megamenu, and if i on some category site then need to see different classes for that categories

<div class="{if category->id == 'A' or any Subcategories in all levels}cat_a{/if}"</div>

<div class="{if category->id == 'B' or any Subcategories in all levels}cat_b{/if}"</div>

" If select category A or any Child Category from A in any levels, then add the class "CAT_A" to the div

" If select category B or any Child Category from B in any levels, then add the class "CAT_B" to the div

CAT A and B and C...is not the root category

Thanks for help