SO fiddle

Test Fiddle mainly for SO Questions

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<content>
   <dom id="1">a</dom>
   <dom id="2">b</dom>
   <dom id="3">c</dom>
   <dom id="4">d</dom>
</content>

JavaScript

(function($) {
    $.fn.reverseOrder = function() {
        return this.each(function() {
            $(this).prependTo( $(this).parent() );
        });
    };
})(jQuery);
$("content dom").reverseOrder();