Suggest Healthy Diet Plan For A Person With GERD And Colitis

My Husband was just diaganosed with GERD; Colitis consistent with infection. He just had a Colonoscopy. please excuse the spelling. Is there a certin diet he should be on? certin foods that he should stay away from? He was perscribed Vancomycin Hcl 125mg quant 56 today after the first antibiotic didn't work. They also put him on prilosec.