public function delPublisher($id)
{
$katalog = Katalog::where('publisher', '=', $id)->get();
foreach ($katalog as $value) {
$k = Katalog::find($value->id);
$k->publisher = NULL;
$k->save();
}
$publisher = Publisher::find($id);
$publisher->delete();
return Redirect::to('admin/publisher');
}
