RBJ

function lang_setlocale() {
 
    $locale = 'ru_RU.UTF-8';

define('LC_LANGUAGE_TERRITORY', 'ru_RU');

$fields_fieldsets = cmsForm::mapFieldsToFieldsets($fields, function($field, $user) use ($item) {
            if (!$field['is_in_item'] || $field['is_system']) { return false; }
            if ((empty($item[$field['name']]) || empty($field['html'])) && $item[$field['name']] !== '0') { return false; }
            if ($field['groups_read'] && !$user->isInGroups($field['groups_read'])) { return false; }
            return true;

RewriteRule ^(.*)\.htm$ $1.html [R=permanent]