how to show only sub-menus?

[Tungsteno]

Hi guys,

i have a page menu like this:

Home

• section1
  • subsection1A
    
  • subsection1B
    
• section2
  • subsection2A
    
  • subsection2B
    

Now the standard showed way is that all menu subsection are showed in pages when you call

Code:

get_navigation(return_page_slug())

Instead i need that for every section page is displayed only the menu with its subsection and leave the others subsection hidden.

Thus, if i'm in the section1 page the submenu showed must be subsection1A, subsection1B.
How can accomplish this?

thanks all