If he plans to play a fair amount of golf (either this trip or returning within the year) then the
DVC golf membership is worth considering. If not then depending if you have transportation (or not) his choices are to play one of the excellent Disney courses (obviously easiest if you have no transportation) or to drive a little way and play off site. Disney are among the most expensive courses in the area, a decent rule of thumb is the further you're prepared to drive from Disney the less you pay for similar quality courses.
1) Disney courses
All Disney courses have good quality hire clubs available. You have the choice of 5 championship courses and a 9 hole "executive"/family walking course.
Of the 18 hole courses my preference is Osprey ridge. Of the others it does depend a little on one's abilities ( or lack of them

). Eagle Pines is forgiving if you're a little wayward at times off the tee, but punishes you if your short off the tee or top the ball occassionally. Palm and Magnolia are pretty "standard" Florida courses if a little long and plenty of water. LBV is not a good choice if you are not straight as much of the course winds through OKW resort and many of the teeshorts require accuracy.
The 9 hole Oak trail is a decent test of golf and is usually in good condition for a course that has quite a few "non golfers" playing it. If you want to play 18 holes on the walking course they offer a "discounted" second 9 holes. If you're short on time it offers a good chance to get some inexpensive practice in. They also will rent a half set of clubs for the 9 hole at a lower price than they will charge for a full set ( obviously ) that is required on the championsghip courses.
2) Off site there are a multitude of great courses in the area. As mentioned standbygolf is a great option to get some fantastic courses at a great price. Courses I like off Disney are Orange County National, Southern Dunes, Highlands reserve and Falcon's Fire.
3) Another option, if you want to give him a very nice suprise, is
http://www.progolfguides.com . This is a playing round with a PGA teaching pro. Basically the day is made up of being collected from your hotel, driven to the course ( you get a selection of courses to choose from) , they will (usually) be able to supply clubs if requested, warm up on the driving range, 18 holes of golf with the pro playing alongside of you (he'll usually give the player a few holes to warm up and to gauge strengths/weaknesses of their game) offer suggestions as to how to manage a course and may offer ideas on how to correct any glaring errors in swing. At the end of the round, if time allows, he may take the player to the driving range and run through a few drills etc that will help correct any major faults with the players game/swing.
It's never going to be possible for a lesson in this style to correct a major error in one visit ( a local and regular series of lessons with a pro is the best idea for that) , but where I found this a major help was with the mental aspect of how one approaches the game and where "going for it" is a workable option and when it's suicide. Phil did help some errors in my swing and it's also worth noting that many people play golf on a course quite differently than they swing in the range or practicing. Obviously being "one to one" with a pro ( you can book Phil for groups of up to 3 players, obviously the more players, the less individual attention each gets, but the cost per golfer is reduced) is not going to be a cheap option, but I thought it was great value for the service provided and it helped my game more in one visit than a whole series of lessons at the range did.