Larry:
"So if it low voltage data cables, it stills needs to be cable tray cable?"
800.100 (H) specs a bunch of comm that is OK in tray. IMHO, there is no 'short' answer. With todays cabling being 'a cable of many uses' you should find CT rated/labeled comm with little or no problems. You may consider a 'multi-use' data cable as your "go to".
As Greg said, keep it neat,! Some inspectors will be 'happy' if it's neat and may not look further.
