Grouping Exposed Filters (using Better Exposed Filters) We have a view using Better Exposed Filters called Programs with an exposed filter on a taxonomy term "Level of Study". I'd like to group this so that the only values in the exposed filters are Graduate and Undergraduate.

I first tried to "group" the terms as follows



but then got errors as follows:

Warning: Illegal offset type in views_many_to_one_helper-&gt;ensure_my_table() (line 954 of /var/www/html/sites/all/modules/views/includes/handlers.inc).




I then tried to rearrange the taxonomy so that Graduate and Undergradute terms are parent to the others as follows:

Graduate
- MFA Degrees    
- Professional Degrees    
- Doctoral Degrees    

Undergraduate    
- Majors and Minors    
- Modules    
- Interdisciplinary Programs


And this still does not yield the desired result. 

So I'm at a loss and opening up a bounty.
First I'd recommend adding a taxonomy term 'Graduate Interdisciplinary Program' to match the 'Undergraduate Interdisciplinary Program'

Assuming you have these taxonomy terms 'weighted' to their respective parent terms 'Graduate' and 'Undergraduate' you can proceed to configure your view.

Configure the filter criteria as follows:

Settings
Content:Has Taxonomy Terms
Vocabulary: Graduate/Undergraduate Programs
Selection Type: Dropdown
Depth: 1



Configure Filter Criteria
Tick - Expose this filter to Visitors, to allow them to change it.
Tick - Grouped Filters
Widget Type - Select List
Label - 'Area of Study'


Finally configure the table as you have it in your screen-shot ... ideally without the overlap of the term 'Multidisciplinary Program' ...