Rewrite Rules add/change

[Rissinko]

Hi guys , Tried or know someone how to change rewrite rules in htacces for prestashop ? i need to create one rewrite rule but i am fighting with urls wich contain category/subcategory/ .... please look below

I have link like :

www.example.com/clothing?selected_filters=manufacturer-Nike
I create rewrite rule which is function and i can use link like this :

www.example.com/clothing/manufacturer-Nike
But now problem is when i want to use this rewrite with link which have subcategory

www.example.com/clothing/t-shirts
My rewrite rule doesn't work because when i use my created rule /manufacturer- in link it change link to this and doesn't work:

http://www.example.com/clothing?selected_filters=t-shirt%2Fmanufacturer-nike

Iam trying something like this :

     RewriteRule ^(.*)/$ ?selected_filters=manufacturer-$1
     RewriteRule ^(.*)/$ ?selected_filters=$1%2manufacturer-$2

and
     RewriteRule ^(.*)/$ ?selected_filters=$1&manufacturer-$2
I already have turned on Friendly url in prestashop so i trying use it with the rewritet urls. And another thing is when i use my rewrited link it still show in browser adress bar that mess version of link.

[Rissinko]

No one can't help me ? hmm