Developers at Cydia Jailbreak community always looking to develop something which brings quick and easy access to your favorite app. They have done it once again by developing a jailbreak tweak called Instaurl which actually let you start browsing from anywhere with simple Gesture configured via Activator. It means, after installing this jailbreak tweak, you can directly search Google, Yahoo, Bing etc by typing your search in the box and press GO button instead of typing a complete Website URL in Safari. Basically instaurl jailbreak tweak is allowing you to access URL bar anywhere on the device.
Search sites which can be configured in the Settings will be displayed in the text box before you start typing. This will let you make sure that what search engine you will be searching with.
In order to get this Cydia App on your iPhone, iPad and iPod Touch, make sure you device is Jailbroken. Click here to tethered Jailbreak iOS 5.0/5.0.1 On iPhone 4, 3GS, iPad, iPod touch using RedSnOw or here for Snowbreeze.
instaurl is a Jailbreak tweak which can be search and downloaded from Cydia under ModMyi repo. Once installed, You can jump over to Settings and set your Search engine.