If you got error when add HMVC library by wiredesignz, so you need this solution. In application/third_party/MX/Loader.php you can do the following changes :

At line 300

return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_object_to_array($vars), '_ci_return' => $return));

change the _ci_object_to_array to _ci_prepare_view_vars

You have done!

Code snippet by gueprogramer