ctools_include('page', 'page_manager', 'plugins/tasks');
ctools_include('page_manager.admin', 'page_manager', '');
ctools_include('export');
$tasks = page_manager_get_tasks_by_type('page');
$pages = array();

foreach ($tasks as $task) {
  if ($page = page_manager_load_task_handlers($task)) {
   $pages[] = $page;
 }
}

dsm($pages);