Bug: sorting of number items in natural order

Hi,

I recently found a bug in your plugin, I have a multiselect which starts with numbers. They are ordered in natural order. e.g.:

1
11
120
2
25
270
3
33

This is unexpected behavior I think.

Because I only use the choosen multi select types, I altered one function:

function woof_init_mselects() {
    try {

        jQuery("select.woof_mselect").each(function(select){
            var select = jQuery(this);
            var options = select.find('option');

            options.sort(function(a,b) {

                if ( !isNaN(parseInt(a.text[0])) ) {
                    a = a.text.replace(/[^[0-9]!?]/g,'');
                    b = b.text.replace(/[^[0-9]!?]/g,'');
                    if (parseInt(a) > parseInt(b)) return 1;
                    else if (parseInt(a) < parseInt(b)) return -1;
                    else return 0
                }
                if (a.text > b.text) return 1;
                else if (a.text < b.text) return -1;
                else return 0
            });
            select.empty().append(options);
        });

        // jQuery("select.woof_select").chosen('destroy').trigger("liszt:updated");
        jQuery("select.woof_mselect").chosen(/*{disable_search_threshold: 10}*/);
    } catch (e) {

    }

Can you please fix it for all list types in your code?