• marketingle

• September 3, 2020 at 11:32 pm

For Select or Multiselect dropdown use the below code to query only parents.

function hide_child_taxonomies( $args, $field ) {
    if( 'YOUR_FIELD_NAME' === $field['_name'] ) {
        $args['parent'] = 0;
    }
    return $args;
}

add_filter('acf/fields/taxonomy/query', 'hide_child_taxonomies', 10, 3);