In a Dutch oven, melt 2 tablespoons butter over medium heat. Add mushrooms and onion; saute until tender. Add wine, four minced garlic cloves and minced onion; bring to a boil. Cook until liquid is absorbed, about 30 minutes. , Meanwhile, cook lasagna noodles according to package directions. In a large saucepan over medium heat, melt remaining butter. Stir in next five ingredients and remaining garlic until blended; gradually add milk. Bring to a boil; cook and stir until thickened, 1-2 minutes. Stir in next six ingredients until blended. Remove from heat., Preheat oven to 350°. Drain lasagna noodles. Spread 1 cup cream cheese sauce in a greased 13x9-in. baking pan. Layer with three noodles, 1 cup sauce, a third of the mushroom mixture and 2/3 cup Parmesan cheese. Repeat layers, adding crabmeat, if desired, between mushrooms and Parmesan. Layer with three more noodles, 1 cup sauce, remaining mushroom mixture and remaining Parmesan cheese. Top with remaining noodles and sauce., For crumb topping, pulse baguette, cheese and butter in a food processor until finely chopped. Stir in chives. Sprinkle over lasagna. Bake, covered, about 50 minutes. Uncover; bake until bubbly, 5-10 minutes longer. Let stand 10 minutes before cutting.