mopsusha,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script>
document.addEventListener("DOMContentLoaded", function() {
var select = document.querySelectorAll("select");
[].forEach.call(select, function(sel) {
[].slice.call(sel.options, 0).sort(function(a, b) {
return a.text > b.text ? 1 : a.text < b.text ? -1 : 0
}).forEach(function(o) {
sel.appendChild(o)
})
})
});
</script>
</head>
<body>
<select multiple="multiple">
<option value="2" selected="selected">С отделкой</option>
<option value="3">Без отделки</option>
</select>
<select multiple="multiple">
<option value="2" selected="selected">Банан</option>
<option value="3">Абрикос</option>
<option value="4">Зелень</option>
</select>
</body>
</html>