$(function(){
    $(".mdxx_list li").each(function () {
        var $mouth = $(this).find('.img .date span');
        if($mouth.text() == 01){
            $mouth.text('Jan');
        }
        if($mouth.text() == 02){
            $mouth.text('Feb');
        }
        if($mouth.text() == 03){
            $mouth.text('Mar');
        }
        if($mouth.text() == 04){
            $mouth.text('Apr');
        }
        if($mouth.text() == 05){
            $mouth.text('May');
        }
        if($mouth.text() == 06){
            $mouth.text('Jun');
        }
        if($mouth.text() == 07){
            $mouth.text('Jul');
        }
        if($mouth.text() == 08){
            $mouth.text('Aug');
        }
        if($mouth.text() == 09){
            $mouth.text('Sep');
        }
        if($mouth.text() == 10){
            $mouth.text('Oct');
        }
        if($mouth.text() == 11){
            $mouth.text('Nov');
        }
        if($mouth.text() == 12){
            $mouth.text('Dec');
        }
    });
})