// Woocommerce checkout address placeholder name changes
add_filter( 'woocommerce_default_address_fields' , 'custom_override_default_address_fields' );
function custom_override_default_address_fields( $address_fields ) {
\!h $address_fields['__company__']['label'] = '__Group/Company Name__';
//See Cacher DB "Woo Checkout Fields & Arrays" for a full list of options
return $address_fields;
}