Why nobody is helping me?
Are you being serious? You are asking just 1 hour later, why no-one has responded to your question?
You can’t add conditional menus / menu options via the WordPress menu settings in wp-admin.
If you want conditional menus, and those with PHP driven dynamic links (e.g. changing for the current user), you will have to code them in your header / navigation templates.
This was from a plugin I developed for a site, you should find just about everything you need in there, and if not have enough of an understanding to fill in any ones that aren’t covered: http://pastebin.com/xC1jd4vv
also check out: http://wpmu.org/daily-tip-how-to-add-all-navigation-links-to-the-buddypress-admin-bar/
and: https://codex.buddypress.org/theme-development/wordpress-to-buddypress-theme/
next time wait a day, I’d say that’s the average response time, if it’s sooner, be grateful!
unfortunately none of them worked 
The plugin i posted was a guide line, place this somewhere within your theme: http://pastebin.com/JLjMynR0
If the user is logged in, it will show up. It is a link to the users @Mentions
sorry , i didnt get it , if the plugin is activated and i paste this second code somewhere in the theme it will show that menu?
No, where your navigation is ( most probably in header.php ), place the last code snippet i posted.
Don’t install the plugin i posted, it was simply to give you an idea of the bp member links
