$(document).ready(function(){
  $.fn.box = function(type) {
    $(this).each(function(i) {
      $(this).html('<table class="box '+type+'"><tr><td class="corner corner1"><div class="bg_wrapper"><div class="bg"></div></div></td><td class="side side1"></td><td class="corner corner2"><div class="bg_wrapper"><div class="bg"></div></div></td></tr><tr><td class="side side4"></td><td class="content"><div class="content_block">'+$(this).html()+'</div></td><td class="side side2"></td></tr><tr><td class="corner corner4"><div class="bg_wrapper"><div class="bg"></div></div></td><td class="side side3"></td><td class="corner corner3"><div class="bg_wrapper"><div class="bg"></div></div></td></tr></table>');
    });
  }
});