BY MATTHEW SALTMARSH AND ERIC DASH Citigroup capped a devastating 2008 by announcing Friday that it would split into two entities and that it had posted an $8.29 billion loss for the fourth quarter. Citigroup confirmed that it would divide, for management purposes, into two separate businesses — Citicorp and Citi Holdings. “We are setting out a clear road map to restore profitability and enable us to focus on maximizing the value of Citi,” it said in a statement with the earnings. Citigroup also issued a statement from its lead director, Richard D. Parsons, signaling that changes in its board...