<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>
<script>
document.querySelectorAll('select').forEach(sel=>{
[...sel.children].sort((a,b)=> a.text > b.text ? 1 : a.text < b.text ? -1 : 0).forEach(el=>sel.appendChild(el));
});
</script>