Simple mod_rewrite help needed

I need a very simple/basic help with htaccess

I have the following line in my .htaccess:
RewriteRule ^([0-9]+)\-([a-zA-Z0-9-]*)(.*)$ /category.php?id_category=$1 [QSA,L,E]

it converts dynamic links from (for example category called: computer accessories):
mysite.com/category.php?id_category=22
to
mysite.com/22-computer-accessories

I want it to be like:
mysite.com/computer-accessories/


help plz

 

RewriteRule ^([a-zA-Z0-9-]*)(.*)/$ /category.php?id_category=$1 [QSA,L,E]

Code (markup):

Not sure if it works. You have to test it.
You should also change the code in your script that handles seo friendly urls.