How to fix a Num_row error

@Mekaboo,

What error are you seeing?

Here is new error:

An uncaught Exception was encountered

Type: Error
Message: Call to a member function num_rows() on boolean
Filename: /home4/cultured/public_html/application/views/DB.class.php
Line Number: 72

For this code:
if($result->num_rows() > 0); {

                while($row = $result->fetch_assoc()){
                    $data[] = $row;