how to arrange user names in chatbox?

hi there to all,

how can i make my users or members name arrange base on their ranks?

Example : cuteblue (admin)
                baby (co-admin)
                tulitz (moderator)
                boboy ( sub-moderator)
                kuko (loyal-member)

all this names are special users

You mean to show them in alphabetic order?

regular members in alphabetical
admins and moderators in ranks. 

what i mean is higher rank on the top and lower rank on the bottom