make uri safe? (remove disallowed characters)

[eluser]Hamed[/eluser]
I want to remove disallowed characters in uri how can I do it?
and also change space to dash.

[eluser]solid9[/eluser]
have you tried reviewing the URI routing in the User Manual?
http://ellislab.com/codeigniter/user-gui...uting.html

[eluser]solid9[/eluser]
also try to read this as well,
http://ellislab.com/codeigniter/user-gui...urity.html