Is there any way to hide phone numbers in phone book of iPhone?

Hello Guys,

I would like to know that, is there any way to hide phone numbers in phone book of iPhone? OR is there any application to do the same?

There is one application available ('Hidden Contacts') but sadly it's only available for Symbian. I am looking for same kind of application for iPhone 3GS.

I'd appreciate your help towards find the solutions.

Awaiting replies in anticipation.

Thanks,
Sarfraz