diff -Naur assign_orig//locallib.php assign_modified//locallib.php
--- assign_orig//locallib.php	2013-07-08 16:57:29.000000000 +0100
+++ assign_modified//locallib.php	2013-09-06 14:46:00.000000000 +0100
@@ -1957,7 +1956,7 @@
                 $grade = '-';
             }
 
-            $courseindexsummary->add_assign_info($cm->id, $cm->name, $sectionname, $timedue, $submitted, $grade);
+            $courseindexsummary->add_assign_info($cm->id, $cm->name, $sectionname, $timedue, $submitted, $grade,$cm->visible);
 
         }
 

diff -Naur assign_orig//renderable.php assign_modified//renderable.php
--- assign_orig//renderable.php	2013-05-16 16:13:52.000000000 +0100
+++ assign_modified//renderable.php	2013-09-06 14:46:00.000000000 +0100
@@ -662,12 +662,13 @@
      *                                 status of the current users submission depending on capabilities.
      * @param string $gradeinfo - The current users grade if they have been graded and it is not hidden.
      */
-    public function add_assign_info($cmid, $cmname, $sectionname, $timedue, $submissioninfo, $gradeinfo) {
+    public function add_assign_info($cmid, $cmname, $sectionname, $timedue, $submissioninfo, $gradeinfo,$visible) {
         $this->assignments[] = array('cmid'=>$cmid,
                                'cmname'=>$cmname,
                                'sectionname'=>$sectionname,
                                'timedue'=>$timedue,
                                'submissioninfo'=>$submissioninfo,
+                               'visible'=>$visible,
                                'gradeinfo'=>$gradeinfo);
     }
 
diff -Naur assign_orig//renderer.php assign_modified//renderer.php
--- assign_orig//renderer.php	2013-05-16 16:13:52.000000000 +0100
+++ assign_modified//renderer.php	2013-09-06 14:46:00.000000000 +0100
@@ -1067,8 +1067,13 @@
         $currentsection = '';
         foreach ($indexsummary->assignments as $info) {
             $params = array('id' => $info['cmid']);
+			$attributes = array();
+			if($info['visible'] == 0){
+				$attributes['class'] = 'dimmed'; 
+			}
             $link = html_writer::link(new moodle_url('/mod/assign/view.php', $params),
-                                      $info['cmname']);
+                                      $info['cmname'],$attributes);
             $due = $info['timedue'] ? userdate($info['timedue']) : '-';
 
             $printsection = '';