Custom URL for the Continue Shopping button in WooCommerce Cart

gistfile1.php

/**
 * Redirect the Continue Shopping URL from the default (most recent product) to
 * a custom URL.
 * Place this code snippet in your theme's functions.php file.
 */
function custom_continue_shopping_redirect_url ( $url ) {
	$url = "http://www.woothemes.com"; // Add your link here
	return $url;
}
add_filter('woocommerce_continue_shopping_redirect', 'custom_continue_shopping_redirect_url');