The repeater rows are a table with each iteration being a row <tr>. Essentially it’s to put in some custom CSS that treats a tr as inline-block – which is horrible but works in some browsers.
Probably best to include the field class (the field ID) so you don’t get unintended consequences.
As my original post suggests I would like more control over repeater fields layout in admin but rewriting the core code for divs rather than tables seems like it may be quite a lot of work.
