You never actually answered my question as to what element type it was.
I'm assuming it's currently a 'dropdown', in which you have set up "Labels" and "Values" for your options.
if so, then create a Fabrik list, which will automatically create an 'id' element, which will be the equivalent of the "Value" you were using for a dropdown element. Create a simple field element called something like "name", which will be the equiv of the "Label" from the dropdown.
Now add new rows to this List, using the usual Fabrik way (Add a new Form from the List display), one for each of the options you had on the old dropdown element.
Now create a 'database join' element on your original list (or change the type of the original dropdown element), set it to render as 'dropdown', select your new table, set the 'value' to the 'id' element, and the 'label' to the 'name' element.
You should now have a join element dshowing as a dropdown on your form, which looks and behaves just like the original dropdown element.
Only now, you have the option to do what I described in my previous post, and decide which of the options you want to show.
The only potential gotcha is if you have existing data for the original dropdown. In which case, BEFORE you change the type of the old dropdown element to a join, you'll need to change the existing data to match the new values.
So say in your original dropdown you had a an option with the label "Social", and the value "soc". You'll need to look at your new table, and find out the value of the new 'id' for the 'Social' row, let's say it's 4. Then change all existing saved data for that from 'soc' to '4' in the old field. You'll have to use something like phpMyAdmin to do this, either by editing each existing row by hand, or there are too many to do that, you can change them all in one SQL query:
UPDATE yourtable SET your_dropdown_element = "4" WHERE your_dropdown_element = "soc"
... just change the table and field names to suit.
-- hugh