Input type disable in plugin in wordpress

I am using ninja plugin in word press, And I want to disable input type so user cant modify that value. How can I do this

in checkbox.php , following code displaying

array( 'name' => __( 'Unchecked', 'ninja-forms' ), 'value' => 'unchecked', ), array( 'name' => __( 'Checked', 'ninja-forms' ), 'value' => 'checked', ),

via Chebli Mohamed