Add friend button

[vidan]

hello, how about if already being a friend?

PHP Code:

<if condition="$prepared['myprofile']">
        <a class="edit_friends_link" href="profile.php?$session[sessionurl]do=buddylist">$vbphrase[edit_your_friends_list]</a>
    <else /><if condition="$prepared['canbefriend']">
        <a class="edit_friends_link" href="profile.php?$session[sessionurl]do=addlist&amp;userlist=friend&amp;u=$prepared[userid]"><phrase 1="$prepared[username]">$vbphrase[befriend_x]</phrase></a>
    </if></if>
    <if condition="$block_data['friendbits']">
        <a href="#friends" onclick="return vB_TabCtrls['profile_tabs'].switch_tab('friends');">$vbphrase[show_all_friends]</a>
    <else />
        &nbsp;
    </if> 


code in memberinfo, if user is friend, then show all friend, if not a friend, show add as a friend, how to make this thing in postbit? is it need a plugin again?