No mention of Taco Cabana or Jack In the Box, so take it for what it's worth....
http://www.mysanantonio.com/food/restaurants/article/365-Days-of-Tacos-The-top-10-picks-from-the-11271088.php#photo-12144338
http://www.mysanantonio.com/food/restaurants/article/365-Days-of-Tacos-The-top-10-picks-from-the-11271088.php#photo-12144338