Fix click event for tabs

The click event handler wasn't attaching to the tab's ``a`` elements because they are missing the ``pp-show-prices-link`` class referenced in the jQuery selector.

This handler works around the missing class by attaching to links that have ``href`` that match a pattern. Adding the class to the links would be the correct long term solution.

Additionally, this introduces a chained jQuery function that shows the selected tabs and hides any number of other tabs.