Widget Style

I want to use a widget from this plugin, but its style looks much different from my default WordPress widgets: http://8pic.ir/images/p8seyhud5mjtdcs72ew9_thumb.png
(Upper one is a HTML list [ul & li] made by an default WordPress widget, and the lower one is a HTML list [again ul & li] made by wp-jalali plugin.)

How I can I force this widget to obey the default style? (ID and class of this sidebar widget is id="ztjalali_archive-3" class="widget widget_ztjalali_archive", and I want it to look like id="archives-3" class="widget widget_archive".)

https://wordpress.org/plugins/wp-jalali/