[HELP] Hiding Certain Usergroups

[mk craig 42]

Okay, well im trying to hide certain usergroups from viewing a certain link depending upon which "Team" they are in.. which i created via User Profile Fields.

I have an external page for Team A and another page for Team B. which is linked to my navbar with this code.

<if condition="$show['guest']">
</if>

<if condition="$show['member']">
<if condition="$bbuserinfo['field16'] === 'Team1'">
        <div class="sidebar_menu"><a href="http://MYSITE.com/forum/Team_A.php">MY TEAM</a></div></if>

<if condition="$bbuserinfo['field16'] === 'Team2'">
        <div class="sidebar_menu"><a href="http://MYSITE.com/forum/Team_B.php">MY TEAM</a></div></if> 
</if>

It works fine as it should.. When in Team A, it does not show the link for Team_A.php, vise verse. But they can still simply change the URL to Team_x.php to view the other teams page, which is what i really dont want.

I need it so that when in Team A, you are UNABLE to view Team B's page.. as well as the other way round.

Could someone help me do this please, many thanks.