public function edit($id)
    {
        $this->load->library('form_validation');

        $this->form_validation->set_rules('fullname', 'Name', 'required');
        $this->form_validation->set_rules('username', 'Username', 'required|min_length[5]|is_unique[user.username]');
        $this->form_validation->set_rules('password', 'Password', 'required|min_length[5]');
        $this->form_validation->set_rules(
            'passconf',
            'Konfirmasi Password',
            'required|matches[password]',
            array('matches' => '%s tidak sesuai dengan password')
        );
        $this->form_validation->set_rules('level', 'Level', 'required');

        $this->form_validation->set_message('required', '%s masih kosong, silahkan isi');
        $this->form_validation->set_message('min_length', '{field} minimal 5 karakter');
        $this->form_validation->set_message('is_unique', '{field} ini sudah dipakai, silahkan ganti');

        $this->form_validation->set_error_delimiters('<span class="help-block">', '</span>');

        if ($this->form_validation->run() == FALSE) {
            $this->template->load('template', 'user/user_form_edit');
        } else {
            $post = $this->input->post(null, TRUE);
            $this->user_m->edit($post);
            if ($this->db->affected_rows() > 0) {
                echo "<scirpt>alert('Data berhasil disimpan');</script>";
            }
            echo "<script>window.location='" . site_url('user') . "';</script>";
        }
    }