add_filter('mbhi_hours_entry', 'mbhi_change_hours_format',10,3);
function mbhi_change_hours_format($entry, $location, $shortcode) {

	// Do nothing when closed that day.
	if($entry->hours === __('Closed','mabel-business-hours-indicator-pro'))
		return $entry;

	// Goal: go from "9 - 17:30" to "9h-17h30", so do two things: remove spaces around "-" and add "h" where needed
	// Remove spaces around by doing "trim".

	$arr = explode('-',$entry->hours);

	for($i = 0; $i< count($arr); $i++) {
		if(strpos($arr[$i],':') !== false)
			$arr[$i] = str_replace(':','h', trim($arr[$i]) );
		else
			$arr[$i] = trim($arr[$i]) . 'h';
	}

	$entry->hours = implode('-',$arr);

	return $entry;

}