MODX Content-linking snippet
NOTE! This snippet [[xContent]] for use ONLY in template layout, instead of [[*content]] tag!
Before start: You have to configure /assets/components/xcontent/xcontent.config.php
with your own regular expressions for your SEO focus words.
U can download compiled transport packet here: http://ershov.pw/blog/modx-revolution/snippet-vnutrennej-perelinkovki