Fix the problem if cache is enabled

Hello, in helper.php in function display, the last parameter of $this->Cache function must be false and not true.
The $data parameter must be an array and not a json, so if the cache is enabled, with last parameter of the function Cache setted to true, Cache return a json instead an array and the templates not work properly.
Merge pull request #2 from Wanted85/patch-1

Fix the problem if cache is enabled