DALLAS -- A unique greeting card department is the highlight of a Kroger supermarket here that opened on the campus of the historic Dr. Pepper headquarters. The department, created for Kroger by Ambassador Cards, includes a replica of the faux-glass-block clock tower that still stands at the former headquarters nearby. "The tower, which serves as a beacon for the department, features the familiar '10, 2 and 4' slogan used successfully by Dr. Pepper to recommend times to consume the popular soft drink," said Becky Bogen, Ambassador retail design manager and part of a 17-person retail presentation group.