Second, that's wikipedia for you. The article itself states that it is out of date, and needs work. Whoever populated that site has not bothered to actually put all the information in.
Try this site, it seems more official:
At the site, you will see that there are currently 17 states with photo id laws. Of those 17, 6 were challenged and not in force (although Texas technically still had their previous rules in place).
Of the 11 active photo id laws, Obama won Florida, Hawaii, Michigan, and New Hampshire.
There were a lot more states with voter ID laws shown, which didn't require photo id.
In general, Wikipedia is a good place to start looking, but you should then go to their links, and also do other research, because they are only as good as the people who decide to edit their pages.
FYI, Texas did not require photo ID this last election.