Quick google search came up with this http://wrestlingsuperstore.com/replicabe… and going to the wwe shop and searching it up I came up with this http://www.wweshop.com/item/wwe-kids-cha…
I KNOW HOW TO HANG A REPLICA BUT NOT THE KID KIND
Kid Belts are light enough I'd just use push pins and string/floss/fishing line
put the pins in and suspend the belt about 4-6 inches below from the wires
but no matter what if this is not for a child it'd look tacky and cheap
if/when you get a real replica for grown ups, i'd suggest buying a small curio shelf with a raised front board so you can have the belt resting against it so it won't fall, then mount the shelf at eye level
Get some nails and hammer them through the two straps on the belt and into the wall.You can also just tape the back of your belt and stick it against the wall. No one will know you have tape on the back of it. You can always use thumb tacks to hang them up too.