Categories & Sub-Categories

Hello,

Before everything, thank you for your free support and great one !

Now I have a little problem about which I have to ask :
I want to make that a parent categorie show only posts on that parent categories, without including posts of every sub category it contain ;
I mean for example Category 1 contain Sub A and Sub B , in my blog, when a user click on category 1, it show articles on category 1 and A and B. I want to make Category 1 show only posts on it, and sub categories show posts on that sub category ! (In the kind of blog I have, I have to make them organized at Parent [Sub – Sub] then again, otherwise I wouldnt’ asked and would already maked them everyone alone !)

My blog coffeecupbreak.com