function save_settings()
{
$settings_model = new Settings_model();
$settings_service = new Settings_service();
$slugs = $this->input->post('slug', TRUE);
$res = 0;
foreach ($slugs as $key => $slug) {
$settings_model->set_slug($key);
$settings_model->set_value($slug);
$res = $settings_service->update_settings($settings_model);
}
echo $res;
}