Use url_title() function and accept certain character

[eluser]tolinho[/eluser]
[quote author="ivantcholakov" date="1403991317"]Split the user input into an array of stings, the separator is '/'. Then on each string (each segment) apply url_title(). Then join the processed segments to get the result, again the glue is '/'. Nothing tricky is here[/quote]

I'll give it a try.
I has hoping maybe passing a parameter with the character I need to allow would do the trick instead or just of just removing all special characters like url_title does.

Thanks