i think here is a search-replace gone wrong. 

the standard line on installation is just (taken from menu)

    You can install this bundle `with composer`_ using the
    `symfony-cmf/menu-bundle`_ package.

    .. _`with composer`: http://getcomposer.org
    .. _`symfony-cmf/menu-bundle`: https://packagist.org/packages/symfony-cmf/menu-bundle