fixed typo in sample code for protecting identifiers
diff --git a/user_guide/database/queries.html b/user_guide/database/queries.html
index ba69fed..59f7e23 100644
--- a/user_guide/database/queries.html
+++ b/user_guide/database/queries.html
@@ -86,7 +86,7 @@
 // outputs prefix_tablename</code></p>

 <h1>Protecting identifiers</h1>

 <p>In many databases it is advisable to protect table and field names - for example with backticks in MySQL. Active Record queries are automatically protected, however if you need to manually protect an identifier you can use:</p>

-<p><code>$this-&gt;db-&gt;protect_identifier('table_name');</code></p>

+<p><code>$this-&gt;db-&gt;protect_identifiers('table_name');</code></p>

 <h1>Escaping Queries</h1>

 <p>It's a very good security practice to escape your data before submitting it into your database.

 CodeIgniter has two functions that help you do this:</p>