working on setting up my Dad's blog for him and I want to style the right sidebar lists for "Categories, Recent Comments, Recent Posts, Archives" like the ones done on this blog (ino dot com / blog /)

the url for my dad's is musicofthemarket dot com

I am using a theme called techozoic and have tried to find the right code snippet to over ride on my child theme, but so far every one I have tried as not worked...also tried to figure it out off the code source for the page I am trying to emulate, again no joy. The main thing I can't figure out is the horizontal bars under each line...all help is greatly appreciated and I thank you in advance.