Do you mean hide icons? If so, just open SBSettings and tap on the gear icon near the bottom left that says "More." The full SBSettings control panel will open up and if you scroll down to where it says "System Wide Options," the first option there is "Hide Icons" which if you click on, you can see that you can toggle icons to be hidden or unhidden. Anything that is Toggled ON is Visible, and anything that is toggled OFF is Hidden. After changing these toggles, you can hit back, then the home button and your device may or may not need to respring. If it does, it will do so on its own.
For "toggling cydia apps," or rather, toggling mobile substrate tweaks (meaning not all your cydia apps will show up here, just most of them that use mobile substrate to work) you follow the same steps I mentioned above until you get to the "System Wide Options," and this time, right below "hide icons," you choose the "Mobile Substrate Addons."
In here you'll see a list of all the mobile substrate tweaks that are running on your device, which is basically the majority of your cydia tweaks. You can toggle them on/off here and respring to see the effects.
Hope that helps.