Parser for Multi-dimensional Array with the same key

The Parser class uses an associative array internally, to accumulate pseudo-variable settings until you call its render(). This means that your pseudo-variable names need to be unique, or a later parameter setting will over-ride an earlier one.

https://codeigniter.com/user_guide/outgo...arser.html

You will need to make your keys unique.

Code:

$data = [
    'person_name' => 'John',
    'partner' => [
        ['partner_name' => 'Mary'],
    ]
];