Internationlization library - no slash after the abbreviation language

[eluser]Unknown[/eluser]
Welcome
Please help me for Internationlization library.
Routing does not work property.
I use this version https://github.com/EllisLab/CodeIgniter/...ation-i18n
When you type in the browser address field www.domain.com/en/ some_action/ some_method everything works fine, but I click on the link on the page receive wrong address www.domain.com/ensome_action/ some_method.
No slash after the abbreviation language.
Please help me to solve the problem.
Below my routes.php code

Code:

$route['default_controller'] = "/index";
$route['404_override'] = '';

$route['^en/(.+)$'] = "$1";
$route['^pl/(.+)$'] = "$1";
$route['^cs/(.+)$'] = "$1";


// '/en' and '/fr' URIs -> use default controller
$route['^en$'] = $route['default_controller'];
$route['^pl$'] = $route['default_controller'];
$route['^cs$'] = $route['default_controller'];

thank you for the help and sorry for my poor english.
jarexx