Add second-level-nav class to footer menus

template.php

@@ -470,7 +470,7 @@ function valencia_third_level_menu($vars) {
  */
 function valencia_footer_menu($vars) {
 	// Var with all HTML of the menu
-	$html = '<ul>';
+	$html = '<ul class="second-level-nav">';
 	// Counter to select first element of every submenu to add class .first
 	$voice_number = 0;