Hoda Kotb, the longtime co-host of the fourth hour of the NBC morning franchise “Today,” will replace Matt Lauer as co-anchor of the program’s opening hours, the network said on Tuesday. Savannah Guthrie, the show’s other anchor, announced the news of Ms. Kotb’s appointment during Tuesday’s broadcast... This is the first time that two women will be the main hosts of “Today,” which first went on the air in 1952 and is the network’s most profitable franchise. The show has an overwhelmingly female audience, and the feel-good nature of much of its content and the convivial byplay between its personalities...