Google currently allows webmasters to modify SiteLinks (site-attached links), according to a Google Webmaster blog. The so-called sitelinks (website additional link) refers to when you search for certain keywords in google, the system automatically shows some important pages to help users navigate quickly.
SiteLinks (site attached link) display is completely automated process, Google's algorithm will resolve the results and content of the site and determine which pages to be provided for the site additional links, the site attached to these algorithms are only for some sites, not for all sites.
Now, the webmaster login Google Webmaster Tools can choose to display or not show some sitelinks (site attached link), because some sitelinks may not be useful to the user, then the administrator can manually delete it. When you delete a page, the page does not appear in the SiteLinks within 90 days, but it takes about one weeks for the deletion to take effect.
To view and manage your sitelinks, please login to Google Webmaster Tools interface, select SiteLinks (site link) can be managed, as shown in the following figure.