Do you mean a tabbed panel? Double click the tab you wish to link, go up to the toolbar and where it says "Hyperlink" you can either link to an in-site page, or enter the URL of the page you wish to link to. I'll post a screenshot for you
If I understand this correct, you are trying to create a hyperlink on a different page, which when clicked, brings the user to the page which has the tabbed pannel and instead of opening the first tab, opens the tab to which you have linked to, for example second tab or the third tab..
I'm afraid that is not possible with the current version of Muse. I will appreciate if you can add it to the ideas section here, http://forums.adobe.com/community/muse/ideas
Let me know if this is not what you wanted.
Europe, Middle East and Africa