How to change the name of Urgent change to something other

Hi All ,

In my case i am Having name of Urgent change as CCB CD

                                                    Normal Change as Project CD

                                                    Admin Change as Manual CD

But in the search criteria the name showing as Urgwent , Normal Etc. how should I change the name of these change document to Specific Customer

These names  needs to be changed accroding to client required names.

Any Help willl be Rewarded with points .

Thanks in Advacne

Regards,

Shashank Sahu