Here's how you can use Safari's private browsing in iOS 7. Private browsing will stop the sites you visit from being listed in history or put into iCloud tabs. It will also stop autofill and prevent sites from using tracking cookies.
1. Open the Safari app.
2. Tap on the icon in the lower right corner to show all open web pages.
3. Tap the Private button in the lower left corner.
4. Tap the Done button.
By default, Safari saves any webpage you visit to you browser history, and makes them available to all your other Apple devices via iCloud Tabs. If for any reason you don't want certain sites you visit to get saved to history or made available to iCloud Tabs - we don't judge! - you can quickly and easily enter Private Browsing mode.More at iMore
Additional resources for iOS