[Help]Result not showing more than 2[PHP]

[Jian]

Well, I need help on this. I have 2 "categories" on the MySQL database and I want to show all of them, but the code I made only show 1 category (The first result in the database). Could you help me? The code I am using is right below.

/*
      * Assembles the entire board.
      * Returns a $string.
      */
      public function makeForum() {
          global $CT, $o;
          $CT->mysqli->query("SELECT * FROM {prefix}forum_category ORDER BY place ASC");
          $return  = '';
          $param    = array('%category_name%', '%category_description%', '%category_forums%', '%board_table_forum%', '%board_table_latest_thread%');
          $template = $o->template->addTpl('category');
          if( $CT->mysqli->num_rows !== 0 ) {
              while( $arr = $CT->mysqli->fetch('query') )
              {
                  $values  = array($arr['name'], $arr['description'], $this->makenodes($arr['id']), BOARD_TABLE_FORUM, BOARD_TABLE_LATEST_THREAD);
                  $return .= str_replace($param, $values, $template);
              }
              return $return;
          } else {
              return '<div align="center"><h1>Forum is not ready at the moment!</h1></div>';
          }
      }
 
    /*
    * Assembling the nodes for a category.
    */
    private function makeNodes($id) {
        global $CT;
        $CT->mysqli->query("SELECT * FROM {prefix}forum_nodes WHERE category = '$id' ORDER BY place ASC");
        $return = '';
        if( $CT->mysqli->num_rows !== 0 ) {
            while( $arr = $CT->mysqli->fetch('query') )
            {
                $return .= '<tr>
                              <td>' . $arr['name'] . '<br /><small>' . $arr['description'] . '</small></td>
                              <td>By me!</td>
                            </tr>';
            }
        }
        return $return;
    }