For the super walmart in Lakeland...heading east on I4 towards Orlando, take exit 18. (98) Go left at the bottom of the exit..you will pass a blockbuster on your right, lakeland mall and a bunch of restaurants on your left, kmart on your right....the super walmart is maybe two miles up after you exit...with the stop lights it may take you 5 minutes, if that.
If you just want a grocery store, take exit 19, come down the exit, take a right at the lights...Publix will be down a little ways on your right (just past mcdonalds)...go a little further and there is a winn dixie on your left.