TEll him that next to the airport is the Immigration Department, I think its behind the Mosque, He will need your passport xerox copies, his passport xerox (a valid RP for your Husband is a must), ID xerox, and he just needs to fill up a form...IS your name endorsed on his passort as a spouse? if not ask him to take a xerox of your marriage certificate, Its easy for him to arrange a 28day visit visa.