wp_reset_admin_postdata.php

/**
		 * Setup a post object and store the original loop item so we can reset it later
		 *
		 * @param obj $post_to_setup The post that we want to use from our custom loop
		 */
		function setup_admin_postdata( $post_to_setup ) {

			//only on the admin side
			if ( is_admin() ) {

				//get the post for both setup_postdata() and to be cached
				global $post;

				//only cache $post the first time through the loop
				if ( ! isset( $GLOBALS['post_cache'] ) ) {
					$GLOBALS['post_cache'] = $post;
				}

				//setup the post data as usual
				$post = $post_to_setup;
				setup_postdata( $post );
			}
		}


		/**
		 * Reset $post back to the original item
		 *
		 */
		function wp_reset_admin_postdata() {

			//only on the admin and if post_cache is set
			if ( is_admin() && ! empty( $GLOBALS['post_cache'] ) ) {

				//globalize post as usual
				global $post;

				//set $post back to the cached version and set it up
				$post = $GLOBALS['post_cache'];
				setup_postdata( $post );

				//cleanup
				unset( $GLOBALS['post_cache'] );
			}
		}