diff --git a/course/category.php b/course/category.php
index 935b83a..ce4864a 100644
--- a/course/category.php
+++ b/course/category.php
@@ -39,6 +39,7 @@ $movedown = optional_param('movedown', 0, PARAM_INT);
 $moveto = optional_param('moveto', 0, PARAM_INT);
 $resort = optional_param('resort', 0, PARAM_BOOL);
 $sesskey = optional_param('sesskey', '', PARAM_RAW);
+$resort_cat = optional_param('resort_cat', 0, PARAM_BOOL); //marx
 
 if (empty($id)) {
     print_error("unknowcategory");
@@ -72,11 +73,19 @@ if (!$category->visible) {
 $canmanage = has_capability('moodle/category:manage', $context);
 $sesskeyprovided = !empty($sesskey) && confirm_sesskey($sesskey);
 
+//compares strings naturally in object keys 
+function cmp($a, $b)
+{
+    return strnatcmp($a->fullname, $b->fullname);
+}
+
 // Process any category actions.
 if ($canmanage && $resort && $sesskeyprovided) {
     // Resort the category if requested
     if ($courses = get_courses($category->id, "fullname ASC", 'c.id,c.fullname,c.sortorder')) {
         $i = 1;
+       //natural sort on course fullname
+       usort($courses, 'cmp');
         foreach ($courses as $course) {
             $DB->set_field('course', 'sortorder', $category->sortorder+$i, array('id'=>$course->id));
             $i++;