изменить ваш идентификатор datetimepicker9 на datetimepicker10
<div class="col-sm-6 col-sm-6">
<div class="form-group">
<div class='input-group date' id='datetimepicker10'>
<input type='text' class="form-control" />
<span class="input-group-addon">
<span class="glyphicon glyphicon-calendar"></span>
</span>
</div>
</div>
</div>
</div>
<script type="text/javascript">
$(function () {
$('#datetimepicker10').datetimepicker({
viewMode: 'years',
format: 'MM/YYYY'
});
});
</script>