New issues with form validation

In your controller:

PHP Code:

$this->load->helper('form'); 


In your registration view:

PHP Code:

echo form_open('user/register_user');
//.... lines of code that build your fields; the form helper makes life easy!
echo form_close(); 


Remove this line from your routes.php file:

PHP Code:

$route['user/register'] = 'user/register'; 


A route is only useful if you want to redirect the given url to another controller/method combination.