Поправил путь к файлам

src/Tree/DBtree.php

@@ -119,7 +119,7 @@ class Tree_DBTree
     //					'right' => 'cat_right',
     //					'level' => 'cat_level'
     //				 )    
-    function CDBTree(&$DB, $tableName, $itemId, $seq, $fieldNames = array()) 
+    function __construct(&$DB, $tableName, $itemId, $seq, $fieldNames = array()) 
     {
         
         if (empty($tableName)) trigger_error("phpDbTree: Unknown table", E_USER_ERROR);

src/Tree/Database.php

@@ -21,7 +21,7 @@ class Tree_Database
     var $db;
     var $host, $user, $pass;
     
-    function CDatabase($db, $host = "localhost", $user = "", $pass = "") 
+    function __construct($db, $host = "localhost", $user = "", $pass = "") 
     {
         $this->db = $db;
         $this->host = $host;