<form action="myAction/" method="post">
<p><select size="3" multiple name="$hero">
<option disabled>Выберитеoption>
<option value="1">Один/option>
<option value="2">Два</option>
<option value="3">Три</option>
<option value="4">Четыре</option>
</select></p>
<p><input type="submit" value="Отправить"></p>
</form>