Former UFC fighter Corey Hill passed away Friday ... after he was hospitalized for a devastating illness, his wife tells TMZ Sports. Hill had been sick for days ... and family members and close friends were told he passed away on Thursday. But Lauran Hill says he was still battling ... until…

The wife of former UFC fighter Corey Hill tells TMZ Sports ... her husband is still alive and fighting for his life ... despite statements from family, friends and the UFC saying he passed away this morning. Hill's close friends and family members had told the media earlier today that Hill died…