<%@ tag body-content="scriptless" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%-- Capture the body evaluation result in a variable --%>
<jsp:doBody var="bodyRes" />

<%-- Convert special characters to character entities --%>
<c:set var="escapedBody" value="${fn:escapeXml(bodyRes)}" />

<%-- Replace "[code]/[/code]" with "<pre>/</pre>" --%>
<c:set var="convBody" 
  value="${fn:replace(escapedBody, '[code]', '<pre>')}" />
<c:set var="convBody" 
  value="${fn:replace(convBody, '[/code]', '</pre>')}" />

<%-- Output the result --%>
${convBody}