Question: Nova Launcher has an integration with cm9 settings like settings-->launcher

now i want to access an application through settings & i don't want any icon in app drawer..is this possible..can someone point me to a tutorial or an example..

Answer: 
I dont think its possible. Because System Settings itself is an app and you cannot push-in your contents into another app unless there's any interface available for this, which in this case Not.

The reason why cm9 has it because its a custom ROM and the developers have customly tailored its setting's section to integrate options from its supported packages at one place.
I'm not sure about CM9-specific APIs (which may or may not exist).

In stock Android, your app can appear under Settings > Accounts & sync if you implement [`AccountManager`](http://developer.android.com/reference/android/accounts/AccountManager.html). You will need to create a mock account if your app does not require sign in. I remember HTC Sense doing this with some of their apps (e.g. weather) at some point, not sure about the most recent versions though.