I noticed that iimage gallery inputs a <gallery> tag into the body of the post, which then outputs as nested divs. I need something like this for my blog. How do you create tags that stand for code? I know the <!--more--> tag outputs html, but I don't know how to create my own tags. For instance, I would like to be able to input <picframe>image</picframe> and have it output as <div><div><div>image></div></div></div>.