[ci skip] Fix #3515
diff --git a/user_guide_src/source/helpers/cookie_helper.rst b/user_guide_src/source/helpers/cookie_helper.rst
index 4a3298f..da26151 100644
--- a/user_guide_src/source/helpers/cookie_helper.rst
+++ b/user_guide_src/source/helpers/cookie_helper.rst
@@ -25,7 +25,7 @@
 The following functions are available:
 
 
-.. function:: set_cookie($name[, $value = ''[, $expire = ''[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = FALSE[, $httponly = FALSE]]]]]]]])
+.. php:function:: set_cookie($name[, $value = ''[, $expire = ''[, $domain = ''[, $path = '/'[, $prefix = ''[, $secure = FALSE[, $httponly = FALSE]]]]]]]])
 
 	:param	mixed	$name: Cookie name *or* associative array of all of the parameters available to this function
 	:param	string	$value: Cookie value
@@ -42,7 +42,7 @@
 	a description of its use, as this function is an alias for
 	``CI_Input::set_cookie()``.
 
-.. function:: get_cookie($index[, $xss_clean = NULL]])
+.. php:function:: get_cookie($index[, $xss_clean = NULL]])
 
 	:param	string	$index: Cookie name
 	:param	bool	$xss_clean: Whether to apply XSS filtering to the returned value
@@ -56,7 +56,7 @@
 	the ``$config['cookie_prefix']`` that you might've set in your
 	*application/config/config.php* file.
 
-.. function:: delete_cookie($name[, $domain = ''[, $path = '/'[, $prefix = '']]]])
+.. php:function:: delete_cookie($name[, $domain = ''[, $path = '/'[, $prefix = '']]]])
 
 	:param	string	$name: Cookie name
 	:param	string	$domain: Cookie domain (usually: .yourdomain.com)