diff --git a/applications/admin/views/default/design.html b/applications/admin/views/default/design.html
index b7fc4991..2d918b83 100644
--- a/applications/admin/views/default/design.html
+++ b/applications/admin/views/default/design.html
@@ -1,5 +1,7 @@
 {{extend 'layout.html'}}
 {{
+import re
+regex_space = re.compile('\s+')
 def all(items):
     return reduce(lambda a,b:a and b,items,True)
 def peekfile(path,file,vars={},title=None):
@@ -304,7 +306,7 @@ for c in controllers: controller_functions+=[c[:-3]+'/%s.html'%x for x in functi
             while path!=file_path:
                 if len(file_path)>=len(path) and all([v==file_path[k] for k,v in enumerate(path)]):
                     path.append(file_path[len(path)])
-                    thispath='static__'+'__'.join(path)
+                    thispath = regex_space.sub('-', 'static__'+'__'.join(path))
     }}
         <li class="folder"><i>&nbsp;</i>
             <a href="javascript:collapse('{{=thispath}}');" class="file">{{=path[-1]}}/</a>