SEO Friendly Blog Titles (link)

[eluser]IamPrototype[/eluser]
I know CI has a function that could turn "My dog is white" into "my-dog-is-white". But how do I make it so if my blog link is http://domain.net/blog/my-dog-is-white/

I mean... how do I create the query etc.? And how does it look when I create entries? Hope y'all understand me.. Just like a link like this http://wpcandy.com/articles/weekend-quic...erphp.html

I've seen Expression Engine's admin panel and it has an input field where you can type whatever you want a make it into the entry URL. How?