need help with dynamic URI Routing

[eluser]Dainius123[/eluser]
i always know in wich controller i have to go to get what i need even after admin changes categories, my main problem is how to make their names appear in URL?

i have array with all categories. So if i have a link: /group1/sort2 even after admin changes name of categorie i will go to /group1/sort2 but in my address bar i will not have changed categorie name because if i would know in what name admin will change it i could change it thru routes.php...