Change label name into other words (e.g. Category => Facility)

Okay I figured out the answer (for those who wants to know)

I just added these lines by using conditional statement:

if ( empty( $val[‘label’] ) or ( true === $val[‘label’] ) )
$val[‘label’] = $tax->labels->singular_name;
if ((($tax->labels->singular_name) == ‘category’) or (($tax->labels->singular_name) == ‘Category’))
$val[‘label’] = ‘Facility Name’;
if ((($tax->labels->singular_name) == ‘tag’) or (($tax->labels->singular_name) == ‘Tag’))
$val[‘label’] = ‘Department’;