When you are putting return inside the jQuery Each method then this is not letting the loop to run for every item. Simply remove this line. The final jQuery each code will be:
$(function () {
$('#selectliste').change(function () {
var l = selectliste.options[selectliste.selectedIndex].innerHTML;
var tous = l.split(' ');
$.each(tous, function(index, value) {
$("#label").html(value) + "<br>";
//return ( value !== "" );
});
})
});