498917 Add Certified Members feature to my Website

Hello, I have a website where users place bids for items like scriptlance. I want to have an upgrade option for members so when they buy this upgrade, then their bids appear in bold and they have an icon next to their name like on scriptlance. The payment coding has already been programmed as well as the upgrade feature itself. Now I need someone to code the upgrade of become a certifies member. Regards