link to Category probleme

Hi there 🙂

Well i created a page and a category to that page,
the page works but the link to the category doesn’t work.

because it comes out like this:

http://www.wwwwwwwww.comcategory/all-products/

here is the probleme missing the /
and also how can i get ride off the category thing just want it to be like this http://www.wwwwwwwww.com/all-products

thanks