Help printing in PHP array!!! Please!

<?
session_name("BACKPACKING_SESS");

// a finir : emepcher un meme utilisateur de voter plusieurs fois sur un meme hotel en stockant une var de session permaneent ds un cookie
//ini_set("session.use_cookies", 1);	// force session by cookies
//ini_set("session.use_trans_sid", 0);  // forbid session id through url 
//session_set_cookie_params(time()+600);
//stop many votes on same hostels by storing session ids linked to the hostel

session_start();
header("Cache-control: private");

// Create Main Menu Items
function set_mainmenu($group) {

	$mainlink_array = array();
	
	$mainlink_array['Home'] = '/index.html';
	$mainlink_array['General Travel Advice'] = '/general-travel-advice.html';
	$mainlink_array['Backpacking'] = '/backpacking.html';
	$mainlink_array['Gap Year'] = '/gap-year.html';
	$mainlink_array['Transport'] = '/transport.html';
	$mainlink_array['Links'] = '/links.html';

	////////////////////////////////////		
	$mainlink_array['Hostels'] = '/main_hostels.html';
	$mainlink_array['Cheap Flights'] = '/cheap-flights.html';
	////////////////////////////////////



	if($mainlink_array) {

		foreach ($mainlink_array AS $title=>$url) {

			switch ($title) {	 // Set green left corners for the required tabs
				case 'Gap Year':
				case 'Transport':
				case 'Links':
				case 'Cheap Flights':
				case 'Hostels':
					$tab_style = 'green';
					break;
				default: 
					$tab_style = '';
					break;
				
			}

			$mainlinks .= '<li'.($group == $title?' class="selected'.$tab_style.'"':'').(($tab_style)? ' class="'.$tab_style.'"' : '').'><a href="'.$url.'"><span>'.$title.'</span></a></li>';
		}

	}

	if(!$mainlinks) { $mainlinks = '<li></li>'; }

	return $mainlinks;
}

// Create Sub Menu
function set_submenu($group) {

	$sublink_array = array();

	switch ($group) {
		
		case 'General Travel Advice':
			$sublink_array['Passport/Visas'] = '/passports-visas.html';
			$sublink_array['Responsible Travel'] = '/responsible-travel.html';
			$sublink_array['Travel Insurance'] = '/travel-insurance.html';
			$sublink_array['Important'] = '/important-information.html';
			$sublink_array['Mobile Phone'] = '/mobile-phone-user.html';
			$sublink_array['Drugs'] = '/drugs.html';
			$sublink_array['Terrorism'] = '/terrorism.html';
			$sublink_array['Malaria'] = '/malaria.html';
			$sublink_array['Reviews'] = '/reviews.html';
		break;

		case 'Gap Year':
			$sublink_array['Planning Ahead'] = '/planning-ahead.html';
			$sublink_array['Things to consider'] = '/things-to-consider.html';
		break;

		case 'Transport':
			$sublink_array['Europe by Bus'] = '/bus-europe.html';
			$sublink_array['Europe by Car'] = '/car-europe.html';
			$sublink_array['Europe by Train'] = '/train-europe.html';
			$sublink_array['USA by Bus'] = '/bus-usa.html';
			$sublink_array['USA by Train'] = '/train-usa.html';

		break;
		
		case 'Cheap Flights':
			
		break;
		
		case 'Backpacking':
		
			$sublink_array['Backpacking Events'] = '/bus-europe.html';
			$sublink_array['Group Activities'] = '/car-europe.html';
			
			
		break;

		default:

		break;
	}

	if($sublink_array) {
		foreach ($sublink_array AS $title=>$url) {
			$sublinks .= '<li'.($_SERVER['PHP_SELF'] == $url?' class="selected"':'').'><a href="'.$url.'">'.$title.'</a></li>';
				
		}
	}
	
	if(!$sublinks)  { $sublinks = '<li></li>';  }

	return $sublinks;

}


ob_start();

?>