Example that bcit-ci/CodeIgniter#1291 has been fixed

config.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * application/config/config.php
 *
 */

//These are the only options in refernece to this issue
$config['base_url']	= '';

$config['csrf_protection'] = TRUE;
$config['csrf_token_name'] = 'csrf_test_name';
$config['csrf_cookie_name'] = 'csrf_cookie_name';
$config['csrf_expire'] = 7200;
$config['csrf_regenerate'] = TRUE;
$config['csrf_exclude_uris'] = array();

welcome_message.php

<?php
/**
 * application/views/welcome_message.php
 *
 */
?>

<div id="container">
<?php
echo form_open('/');

$data = array(
              'name'        => 'username',
              'id'          => 'username',
              'value'       => 'johndoe',
              'maxlength'   => '100',
              'size'        => '50',
              'style'       => 'width:50%',
            );

echo form_input($data);
echo form_submit();
echo form_close();

?>
</div>