The problem is when generating Zend_Navigation menu in the view all links have "/projects/add/" href. At the same time when "/projects/list/" is active all links are correct. The same if I deleted this route - all links are ok.
So, while "/projects/add/" href is active the problem is.
Part of code from bootstrap:
$frontController = Zend_Controller_Front::getInstance();
$router = $frontController->getRouter();
$router->addRoutes(array(
'AddProject' => new Zend_Controller_Router_Route('/projects/add/:key', array('module' => 'default', 'controller' => 'projects', 'action' => 'add', 'key' => '')),
));