Autolinking is a feature of Moodle by which words or phrases used within a Moodle site are automatically linked (by highlighting in grey by default) to a glossary and database entries, and activity and resources within the course with the same name.
Autolinking can be switched on/off sitewide by going to Settings > Site Administration > Plugins > Filters > Manage Filters. and it can also be managed within individual courses from Settings > Course Administration > Filters.
For more information on autolinking, see Filters.
Specific links can be prevented by adding <nolink> ... </nolink> tags around the relevant content in HTML markup mode.
Another way to force autolinking on/off is to use:
- <span class="link">text</span>
- <span class="nolink">text</span>