Try it like,
var ul = $('<ul>').appendTo('body');
function createList() {
ul.empty();
$('select option:selected').each(function() {
li = $('<li/>').text($(this).text()).attr('value', this.value);
li.appendTo(ul);
});
}
$('select').on('change', function() {
createList()
}).trigger('change');
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<select name="is_format" id="is_format">
<option value="A4">{l s="A4"}</option>
<option value="A3">{l s="A3"}</option>
</select>
<select name="is_color" id="is_color">
<option value="Couleur" selected>{l s="Couleur"}</option>
<option value="Noir/Blanc">{l s="Noir et Blanc"}</option>
</select>
3
solved Jquery Multiple Select Show values in