Don't use the adaptivetheme menu tree callback function.

#2904 
Before:
![selection_003](https://f.cloud.github.com/assets/1222368/636685/bf405a30-d28c-11e2-8e59-1db1675946a7.png)


After:
![selection_002](https://f.cloud.github.com/assets/1222368/636687/c437820c-d28c-11e2-88fa-e49568b1b299.png)