After seeing these boxes on Give Mom a Minute, I knew they would be super easy to do. All you need is a couple cardboard boxes ( mine are bulk cheez-it boxes), spray paint, some burlap fabric and a hot glue gun.
Warning: you will use a lot of hot glue!
First I spray painted the boxes white, just incase you saw through the fabric. Then, with the burlap, I covered the two ends first, just like wrapping a gift, and I cut pieces to fit over the middle of the sides. This project cost me about $3 and saved about $37, since burlap or wisker boxes are about $20 each in the stores.
UPDATE ( 11/25): I found the original place I saw these boxes, the original inpsiration for mine here at Under the Table & Dreaming.