<select id="lang_select">
    <option value="en" selected="selected">english</option>
    <option value="ar">العربية</option>
    <option value="az">azərbaycanlı</option>
    <option value="bg">български</option>
    <option value="ca">català</option>
    <option value="cs">český</option>
    <!-- some data cut -->
</select>

$(document).on('change',"select",function(){
    var i = $(this)[0].selectedIndex;
    var ch = $(this).children().each(function(index){
        $(this).prop('selected',index == i);
        if (index == i) {
            $(this).attr('selected','selected');
        } else {
            $(this).removeAttr('selected');
        }
    });
});