$('body').on('click', '.item', function() {
    var id = $(this).attr('data-value');
    if ($(this).data('value')) {
        $.ajax({
            type: 'POST',
            url: URL + '/admin/ajax/delete/coursestudent',
            data: 'id=' + id,
            success: function(resp) {
            $('.selectize-input div[data-value="' + id + '"]').remove()
            Snackbar.show({ text: " " + id + " User silindi", customClass: 'bg-success' });
            }
             });
    } else {
         alert(" "+ id + " not delete");
    }
});