I am using Laravel3 `Response::eloquent`.

The result is in JSON format: `{"id":"1"}`. However I want the result like this: `{"id":1}` with `id` as a number, not string type. 

I use apache and `Content-Type` is `application/json; charset=UTF-8`.

The problem only occurs on the production system. On my localhost the result is `{"id":1}`.

Is there any relevant setting for Apache or Laravel3 ?