<?php
error_reporting(-1);
//header("Content-Type: text/plain; charset=utf-8");

$tree = ["Россия" => [
				"Москва" => [
							"МГУ" => [
										"Вася",
										"Петя" => [3,4,5,3],
										"Маша",
										"Даша",
										"Рома"
										],
							"МГТУ" => [
										"Степа",
										"Валя",
										"Педаля"
									],
							"МГИМО" => [
										"Клава",
										"Саша"
									],
							"МИФИ" => [
										"Оля",
										"Митя"
									]
							],
				"Питер" => [
							"СпбГУ" => [
										"Вася",
										"Петя" => [5,5,5,5],
										"Даша",
										"Рома"],
							"СпбМТУ" => [
										"Оля",
										"Митя"],
							"СпбТИ" => [
										"Юра",
										"Шура",
										"Шкура"]
							],
				"Новосибсрик" => [
							"НГУ" => [
										"Антон",
										"Питон",
										"Валя"],
							"НГТУ" => [
										"Краля",
										"Уля"]
								],

					]


		];

//print_r($tree);

function drawArraySneaky ($var) {

	if(is_array($var)) {
		echo "<ul>";
		foreach ($var as $name => $value) {
			echo "<li>";
			if (!is_integer($name)){
				echo "$name:";
			}
			drawArraySneaky ($value);
			echo "</li>";
		}
		echo "</ul>";
	} else {

		echo $var; 

	}

}


drawArraySneaky($tree);