There are a lot of different URL's for one thing like 'manufacturers'
If you're on one page (let's say main page) and go to the page of one manufacturer, there will be shown one URL -> http://prntscr.com/3q4kwq (http://prntscr.com/3q4kwq)
If to go to the page of manufacturer while you're on the page of categories then you'll see this URL -> http://prntscr.com/3q4l7b (http://prntscr.com/3q4l7b)
And there is a problem like this with everything
How to make only one URL for each of manufacturers so that from all pages of web-site it would be referred to one page not 10 pages with different URL's
Please help :(