Change a multiple value field to use divs instead of a table in node/add?
You can override theme_field_multiple_value_form(), e.g.

function MYTHEME_field_multiple_value_form($vars) {
  // Copy code from theme_field_multiple_value_form() and change as appropriate
}


It's not a short function, and you'll probably be reproducing a bunch of code, but it uses theme_table() directly so it can't be solved with a preprocess function.