private function getSortOrderOfCategory($category)
{
static $order = null;
if (is_null($order)) {
$order = array('Referrers_Referrers', 'General_Visit', 'General_Visitors', 'VisitsSummary_VisitsSummary');
}
$value = array_search($category, $order);
if (false === $value) {
$value = count($order) + 1;
}
return $value;
}