undefined variable in codeigniter-Collection of common programming errors

A PHP Error was encountered

Severity: Notice
Message: Undefined variable: data
Filename: views/body_view.php
Line Number: 13
A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: views/body_view.php
Line Number: 13

So I have this problem in Codeigniter

Controller:

Model:

View:

    
    

    a