without knowing your starting point, the only suggestion would have to be taxi.
however there are buses operated by GoLynx, and routes 4, 7, 37, 42, 43 and 52 serve the mall from various points in the city. check bus schedules at http://www.golynx.com/?fuse=cstm&app=route
(the downloadable map file is 9mb!)
As you are on international drive, use the "I ride" to go up and down and I think it is sand lake road where you get the lynx bus, I think it was the 42 we nearly always casught, seem to run pretty often. worth gettiong pass for I ride during your stay they are real cheap, have great time.