function index()
    {
        //set validation rules
        $this->form_validation->set_rules('name', 'First Name', 'trim|required|alpha|min_length[3]|max_length[30]|xss_clean');
        $this->form_validation->set_rules('prenom', 'Last Name', 'trim|required|alpha|min_length[3]|max_length[30]|xss_clean');
        $this->form_validation->set_rules('email', 'Email ID', 'trim|required|valid_email|is_unique[teacher.email]');
        $this->form_validation->set_rules('password', 'Password', 'trim|required|matches[cpassword]|md5');
        $this->form_validation->set_rules('cpassword', 'Confirm Password', 'trim|required|md5');

        //validate form input
        if ($this->form_validation->run() == FALSE)
        {
            // fails
            $this->load->view('backend/user_registration_view');
        }

<div class="panel-body">
                <?php $attributes = array("name" => "registrationform");
                echo form_open("user/register", $attributes);?>
                <div class="form-group">
                    <label for="name">First Name</label>
                    <input class="form-control" name="name" placeholder="Your First Name" type="text" value="<?php echo set_value('name'); ?>" />
                    <span class="text-danger"><?php echo form_error('fname'); ?></span>
                </div>

http://prof.skolarie.com/index.php/user/index