Shift in marketing focus features the chefs of Time Warner Center

NEW YORK —National ad campaigns are rarely done for collections of mall-based restaurants, but Time Warner Center is making an exception to build on what management says were strong sales in 2007 and to brand itself as a premier dining destination.

With midtown Manhattan remaining a magnet for hungry business travelers, tourists and well-heeled locals, the high-rise landmark at the southwest corner of Central Park is featu