Stripping the wrappers in a custom field d7
You can override field.tpl.php and its derivatives if you want to code it manually.

Or the Fences module might do the trick:


  Fences is a an easy-to-use tool to specify an HTML element for each field. This element choice will propagate everywhere the field is used, such as teasers, RSS feeds and Views. You don't have to keep re-configuring the same HTML element over and over again every time you display the field.


It lets you control the base markup for each field through the UI - a must have for any project these days in my opinion :)