Updating user guide :php:func: refs to :func:
diff --git a/user_guide_src/source/helpers/security_helper.rst b/user_guide_src/source/helpers/security_helper.rst
index b06f78d..cf9854c 100644
--- a/user_guide_src/source/helpers/security_helper.rst
+++ b/user_guide_src/source/helpers/security_helper.rst
@@ -97,7 +97,7 @@
This is a security function that converts PHP tags to entities.
-.. note: :php:func:`xss_clean()` does this automatically, if you use it.
+.. note: :func:`xss_clean()` does this automatically, if you use it.
Example::