[treki]

Unfortunately i have not permissions in this thread for posting.
A friend have vB3.8.9 too and the same hack. There it works.

Edit:
I have a solution for Sid hide hack under vB 3.8.9.
Replace the content of "fetch hide tag" with:

if ($this->registry->options['sid_hide_active'] == '1' AND stristr($post['message'],'[hide]')){
            global $vbulletin, $vboptions, $bbuserinfo, $db, $threadid, $hide_call, $postid;
            $bbuserinfo = $this->registry->userinfo;
            $post = $this->post;
            $hide_read = false;
            $hide_img_set = 0;
            $hide_replied = '';
            $hide_thanked = '';
            $hide_stop = 0;
            if (!empty($this->registry->options['sid_hide_notforum'])){
                $sid_hide_forum_stop = explode(",",$this->registry->options['sid_hide_notforum']);
                if(in_array($thread['forumid'],$sid_hide_forum_stop)){
                    $post['message'] = preg_replace('/\\[hide\\](.*)\\[\/hide\\]/siU', '\\1', $post['message']);
                    $hide_stop = 1;
                }
            }
            if($post['userid'] == $bbuserinfo['userid'] AND $hide_stop == 0){
                $post['message'] = preg_replace('/\\[hide\\](.*)\\[\/hide\\]/siU', '<fieldset><legend><span class="highlight">'.$vbphrase[sid_hide_post_own].'</span></legend>\\1</fieldset>', $post['message']);
                $hide_stop = 1;
            }
            if ($hide_stop != 1){
                if ($this->registry->options['sid_hide_showadmin'] AND $bbuserinfo[usergroupid]==6){
                    $hide_read = true;
                }elseif ($this->registry->options['sid_hide_showmod'] AND can_moderate($thread['forumid'])){
                    $hide_read = true;
                }elseif (!empty($this->registry->options['sid_hide_showusergroup'])){
                    $hide_groups_see = explode(",",$this->registry->options['sid_hide_showusergroup']);
                    if (in_array($bbuserinfo['usergroupid'], $hide_groups_see)){
                        $hide_read = true;
                    }
                }
                if ($vbulletin->options['sid_hide_showthanked'] AND $hide_read==false){
                    $hide_img_set = $hide_img_set + 1;
                    if($vbulletin->options['post_thanks_forum_first_all'] == 1){
                        $hide_thanked = $db->query_first("SELECT userid FROM ". TABLE_PREFIX ."post_thanks WHERE postid='$threadinfo[firstpostid]' AND userid='$bbuserinfo[userid]'");
                        if($hide_thanked !=''){
                            $hide_read = true;
                        }
                    } elseif (!empty($vbulletin->options['post_thanks_forum_first'])){
                        $post_thanks_only_first = explode("|",$vbulletin->options['post_thanks_forum_first']);
                        if (in_array($threadinfo['forumid'], $post_thanks_only_first)){
                            $hide_thanked = $db->query_first("SELECT userid FROM ". TABLE_PREFIX ."post_thanks WHERE postid='$threadinfo[firstpostid]' AND userid='$bbuserinfo[userid]'");
                            if($hide_thanked !=''){
                                $hide_read = true;
                            }
                        }else{
                            $hide_thanked = $db->query_first("SELECT userid FROM ". TABLE_PREFIX ."post_thanks WHERE postid='$post[postid]' AND userid='$bbuserinfo[userid]'");
                            if($hide_thanked !=''){
                                $hide_read = true;
                            }
                        }
                    } else{
                        $hide_thanked = $db->query_first("SELECT userid FROM ". TABLE_PREFIX ."post_thanks WHERE postid='$post[postid]' AND userid='$bbuserinfo[userid]'");
                        if($hide_thanked !=''){
                            $hide_read = true;
                        }
                    }
                }
                if ($this->registry->options['sid_hide_showposted'] AND $hide_read==false){
                    $hide_img_set = $hide_img_set + 2 ;
                    $hide_replied = $db->query("SELECT COUNT(postid) AS count FROM ". TABLE_PREFIX . "post WHERE userid='$bbuserinfo[userid]' AND visible = 1 AND threadid='$post[threadid]'");
                    $myreplies = 0;
                    if($db->num_rows($hide_replied)){
                        while ($h_post = $db->fetch_array($hide_replied)){
                            $myreplies += $h_post['count'];
                        }
                        $myreplies = vb_number_format($myreplies);
                    }
                    if($myreplies > 0){
                        $hide_read['userid'] = true;
                    }
                }
                if (!$hide_call){
                    $hide_call =$post['postid'];
                } else {
                    $hide_call .=",".$post['postid'];
                }
                if($hide_img_set == 3){
                    $hide_img = $vbphrase[sid_hide_img_pot];
                } elseif ($hide_img_set == 2){
                    $hide_img = $vbphrase[sid_hide_img_post];
                } elseif ($hide_img_set == 1){
                    $hide_img = $vbphrase[sid_hide_img_thank];
                } else {
                    $hide_img = $vbphrase[sid_hide_img_sorry];
                }
                if(!$bbuserinfo[userid]){
                    $hide_read = false;
                }
                if ($hide_read == true){
                    $post['message'] = preg_replace('/\\[hide\\](.*)\\[\/hide\\]/siU', '<fieldset><legend><span class="highlight">'.$vbphrase[sid_hide_post_show].'</span></legend>\\1</fieldset>', $post['message']);
                } else {
                    eval('$hide_fetch = "' . fetch_template('sid_hide_noaccess') . '";');
                    $post['message'] = preg_replace('/\\[hide\\](.*)\\[\/hide\\]/siU', $hide_fetch, $post['message']);
                }
            }
        }