I would set the default behavior to what you want if the form is not submitted or if there are validation errors and then redirect if the user if the form is successfully processed.

i.e.

function register() {
    $this->load->library( form_validation );     
    $this->form_validation->set_rules( name ,  Name ,  required|xss_clean );
    $this->form_validation->set_rules( description ,  Description ,  required|xss_clean );
    $this->form_validation->set_rules( contact ,  Contact ,  required|xss_clean );
    $this->form_validation->set_rules( email ,  Email Address ,  required|valid_email );
    $this->form_validation->set_rules( password ,  Password ,  required|min_length[  . $this->config->item( min_password_length ,  ion_auth ) .  ]|max_length[  . $this->config->item( max_password_length ,  ion_auth ) .  ]|matches[password_confirm] );
    $this->form_validation->set_rules( password_confirm ,  Password Confirmation ,  required );

    if ($this->form_validation->run()) {
        // Do some stuff here to process the form
        // Maybe set the success flash message
        // Then redirect
        redirect( organizations/login );
    } else {

        $data[ message ] = (validation_errors() ? validation_errors() : ($this->ion_auth->errors() ? $this->ion_auth->errors() : $this->session->flashdata( message )));

        $data[ name ] = array( name  =>  name ,
             id  =>  name ,
             type  =>  text ,
             value  => $this->form_validation->set_value( name ),
        );
        $data[ description ] = array( name  =>  description ,
             id  =>  description ,
             type  =>  textarea ,
             value  => $this->form_validation->set_value( description ),
             class  =>  form-textarea ,
        );
        $data[ email ] = array( name  =>  email ,
             id  =>  email ,
             type  =>  text ,
             value  => $this->form_validation->set_value( email ),
        );

        $data[ contact ] = array( name  =>  contact ,
             id  =>  contact ,
             type  =>  text ,
             value  => $this->form_validation->set_value( contact ),
        );

        $data[ password ] = array( name  =>  password ,
             id  =>  password ,
             type  =>  password ,
             value  => $this->form_validation->set_value( password ),
        );
        $data[ password_confirm ] = array( name  =>  password_confirm ,
             id  =>  password_confirm ,
             type  =>  password ,
             value  => $this->form_validation->set_value( password_confirm ),
        );
    }

    $this->load->view( organisations/create , $data);
}

这可能要求你改变现在如何安排某些事情,但我发现这是处理这种情况的最容易的方法。