Hi @patrickzdb
Thanks for the question. Currently, optgroup functionality is not supported into the UI textarea when editing a field.
This said, you can use a filter called acf/load_field to modify the select field’s choices. This is detailed in the tutorial found here:
http://www.advancedcustomfields.com/resources/tutorials/dynamically-populate-a-select-fields-choices/
I will add this feature request to my to-do list and you can expect to see it soon.
But for now, you will need to use this filter to modify the $field[‘choices’]
A normal choices array looks like this:
<?php
$field['choices'] = array(
'red' => 'Red',
'blue' => 'Blue'
);
?>
And an optgroup choices looks like this:
<?php
$field['choices'] = array(
'Colors' => array(
'red' => 'Red',
'blue' => 'Blue'
),
'Shades' => array(
'black' => 'Black',
'white' => 'White'
),
);
?>
Hope that helps.
Thanks
E
