Hide any control in master page for example site actions

In order to hide site actions ribbon you can use spsecuritytrimmedcontrol in master page.

<SharePoint:SPSecurityTrimmedControl ID=”SPSecurityTrimmedControl1″
  PermissionsString=”manageLists” runat=”server”>

hidden controls for users who do not have managelists permission

</SharePoint:SPSecurityTrimmedControl>