You can hide unwanted System Preferences from appearing in the control panel without actually removing them. This is a helpful distinction for setting up other user accounts or just for hiding System Prefs you never access and no longer need:
No doubt about it: the Dock is a useful way to access applications, folders, and files, but it also takes up a fair amount of space. That can be a pain, especially if you’re using a laptop. Since you probably don’t need to see the Dock all the time, hide it. Go to the Dock preference pane and select the Automatically Hide And Show The Dock option.
Now the Dock will remain invisible until you position your cursor over it. While you’re in the preference pane, check out the other Dock options. Here you can change its size, position, and more. It’s also easy to access these settings from the Dock itself: just Control-click on the Dock’s separator to see a contextual menu.
Open “System Preferences” from the Apple menu and pull down the “View” menu, selecting “Customize”
Uncheck each preference panel you want hidden, then click “Done”
For Mac OS X Lion and iCloud users, this is a simple way to ditch the now unnecessary MobileMe preferences from cluttering the options.
For setting up a limited user account, hiding many of the panels and then sorting the remaining panes alphabetically can make the entire System Preferences app easier to use.
Mac OS X’s System Preferences program is the one-stop shop for customizing many aspects of your operating system. Open System Preferences by choosing Apple menu -> System Preferences, or by clicking on the Dock icon that looks like a set of gears. Each preference pane is labeled to give you a clear idea of what type of elements it lets you change: Appearance, Spotlight, Displays, Network, and so on. Many of these preference panes contain settings that can help you save time and make your computing experience better or more efficient.
Related Post of How to hide System Preference Panels in Mac OS X