When you building application most likely there are common links within the layout. They could be in a menu, or let’s say “edit profile” and ‘logout’ links which are visible everywhere. As you probably know if you use Html Helper the link could be either Cake-relative URL or array of URL parameters.

The problem may occur if you using the second option – the array.

For example if we have link like this:

which will produce link like:

The problem came if the application uses plugins and the user is in inside the plugin. Then the generated link will be:

Which is not the correct one.

So the idea is:
if you adding links in the layout with array of URL parameters, always add an extra parameter ‘plugin’=>false to prevent problems like this.

So the link should look like:

and it will produce the correct code. Otherwise you risk to have broken links.