The John and Christina Markey Malden Senior Community Center, which opened in 2009 in a former church on Washington Street, has won a top honor from the National Community Development Association. The center received the association’s 2012 Audrey Nelson Community Development Achievement Award, recognizing the best use of federal Community Development Block Grant money to improve low-income neighborhoods. Nominations for the award are accepted from communities across the country. The Malden Redevelopment Authority nominated the center, which is named for the parents of US Representative Edward J. Markey, a Malden Democrat. Stephen M. Wishoski, the redevelopment authority‘s executive director, said his agency’s staff deserves a lot of credit for the recognition.