How to convert non readable url to readable url?

I have a page of the product list with some options. One of the options is Category. When I click on Kid's category then the url like this 'http://localhost/netshop/productList?cat=Kid%27s&brand=&type=&price=&off=&pagi=50'.

When try to check the url using url()->current() method get the above url. Where 'cat=Kid%27s' is non-readable. I want to readable url. How to solve this problem?

via Chebli Mohamed