Index: course/lib.php
===================================================================
--- course/lib.php	(revision 14710)
+++ course/lib.php	(working copy)
@@ -3624,6 +3624,29 @@
 }
 
 /**
+ * Allow the format to set it's own page layout
+ *
+ * @param string $format Course format ID e.g. 'weeks' $course->format
+ * @param moodle_page $page The page to manipulate
+ * @return void
+ */
+function course_format_set_pagelayout($format, moodle_page $page) {
+    global $CFG;
+
+    $featurefile = $CFG->dirroot.'/course/format/'.$format.'/lib.php';
+    $featurefunction = 'callback_'.$format.'_set_pagelayout';
+    if (!function_exists($featurefunction) && file_exists($featurefile)) {
+        require_once $featurefile;
+    }
+    if (function_exists($featurefunction)) {
+        $featurefunction($page);
+    } else {
+        // Default behavior
+        $page->set_pagelayout('course');
+    }
+}
+
+/**
  * Returns the information about the ajax support in the given source format
  *
  * The returned object's property (boolean)capable indicates that
Index: course/view.php
===================================================================
--- course/view.php	(revision 14710)
+++ course/view.php	(working copy)
@@ -92,7 +92,7 @@
         $course->format = 'weeks';  // Default format is weeks
     }
 
-    $PAGE->set_pagelayout('course');
+    course_format_set_pagelayout($course->format, $PAGE);
     $PAGE->set_pagetype('course-view-' . $course->format);
     $PAGE->set_other_editing_capability('moodle/course:manageactivities');