function sl_kz_update_city_form($form, &$form_state) {

    $query = db_select('sl_kz_cities', 'n')->fields('n', array('id', 'city'));

    $result = $query->execute();

    if(!$result->rowCount()) {
        return t("Cities is empty");
    }

    $form['cities'] = array(
        '#tree' => TRUE,
        '#theme' => 'tabular_form', // Функция, с помощью которой мы будем придавать форме табличный вид
        '#header' => array('City', 'New value'), // Заголовок таблицы
    );

    foreach ($result as $city) {
        $form['cities'][$city->id]['city'] = array(
            '#markup' => $city->city
        );

        $form['cities'][$city->id]['new_value'] = array(
            '#type' => 'textfield',
            '#default_value' => $city->city,
            '#required' => true,
        );
    }

    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Update'),
    );

    return $form;
}

function sl_kz_update_city_form_submit($form, &$form_state) {
    $query = db_update('sl_kz_cities');
    $values = $form_state;
    dsm($values);

    foreach($values as $value) {
        dsm($value);
        $query->fields(array(
            'city' => $value['values']['cities']['new_value'],
        ));
        $query->condition('id', $form_state['values']['cities']['id'])->execute();
    }
    drupal_set_message(t('Cities updated'));
    drupal_goto('admin/config/system/sl-calc-kz/add');
}