Mine

// help us break up this data
		$menus = array();
		$c_menu_id = null;
		$newmenu = false;
		$menu = null;
		$c_part_id = null;
		$part = null;
		$newpart = false;
		
		foreach( $res as $row ) {
			
			// new menu or new menu part?
			$newmenu = $c_menu_id != $row["menu_id"];
			$newpart = $c_part_id != $row["part_id"];
			
			if( $newmenu ) {
				
				// create a new menu
				$c_menu_id = $row["menu_id"];
				$menu = array();
				$menu["title"] = $row["m_title"];
				$menu["parts"] = array();
			}
			
			if( $newpart ) {
				
				// create a new menu part
				$c_part_id = $row["part_id"];
				$part = array();
				$part["title"] = $row["mp_title"];
				$part["items"] = array();
			}
			
			$item = array();
			
			$item["title"] = $row["title"];
			$item["description"] = $row["description"];
			$item["cost"] = $row["cost"];
			
			$part["items"][] = $item;
			
			/*
			if( $newpart )
				print_r($part);
			*/
			
			if( $newpart )
				$menu["parts"][] = $part;	// add it to our current menu
			if( $newmenu )
				$menus[] = $menu;	// add it to our menus
		}
		
		$data["menus"] = $menus;