How do I clear open pages on the ios7

iOS 7 How to Close Apps

Double Tap the Home Button... Then swipe the App (not the icon) Upwards... Tap the Home Button when finished.

More Info on Multitasking Here > http://support.apple.com/kb/HT4211

What pages are you referring to?

If in Safari, tap the lower right icon to view all tabs, then swipe the page you want to close to the left or right.

If you mean you want to close open apps, see: https://sites.google.com/site/appleclubfhs/support/advice-and-articles/closing-a pps