altering the tree before rendering

Hi,

I too am in dire need for the solution to this. Please ca someone point me in the right direction?
Thanks.

You could achieve this by using a view to return a filtered list. Not tried with a hierarchical taxonomy, but I added a field to my taxonomy, which in your case would be a 'visible at registration' Boolean. You can then build a view and filter it by your new field to limit the options returned. The setup for filtering the taxonomy using this view is straightforward after that.

http://drupal.stackexchange.com/questions/100225/programmatically-alter-...
this link will help you on how to alter/filter the tree.

I added a patch which implements an alter hook right before rendering the tree.
In a recent project I used this to strip some values from the tree.

In your module, just use a my_module_ term_reference_get_children_alter($terms) function.

Look good

Update patch.

Update patch.

In my opinion, we can use drupal_alter('term_reference_get_children', $tree[$vid]); instead of drupal_alter('term_reference_get_children', $tree[$vid]['terms']);