some of the restaurants on the official Disneyworld website have pdf menus...go to disneyworld.com, scroll to bottom of page, find dining , click on it...when you get to the dining page, search for the restaurant you're interested. If the pdf for the menu is available it will be down on the lower right of the restaurant's page.
allears.net and wdwinfo.com both have dining pages with menus available...but they are not always accurate, even when they say they were just updated we have found numerous errors, so I suggest you only use those sites to get an idea of the types of items you may find at those restaurants.