Brett on 01 May, 2012 07:31 PM
I'm afraid this isn't a possibility with the default MultiMarkdown processor. There are, however, some custom processors that let you define classes on block elements such as UL (I think Kramdown and Maruku can do it). Custom processors are fairly easy to set up, but they _will_ change other parsing capabilities as well. Let me know if you need a hand with that.
Brett on 01 May, 2012 07:57 PM
Yes, you can add any script that takes input on STDIN and outputs to STDOUT work as a custom processor (which Markdown.pl does by default).
Neither Markdown nor Marked are designed to output complete websites, and websites generally shouldn't be designed such that classes and extra markup are required within the content (with the exception of image alignment). I know there are special cases, but adding markup into the output is costly for processing and adds many variables to deal with.