Pull Request 2 Dev 1.1

Suggestion po regarding filter options, you can do something like this po:

```php
$filter_options = array(
    1 => constant_name_1,
    2 => constant_name_2,
    3 => constant_name_3,
);
```

and then in the `comment/view`:
```php
<?php foreach($filter_options as $k => $v): ?>
<option value="<?php echo $k ?>"><?php echo $v ?></option>
<?php endfor ?>
```

Then in the filter function of Comment model, change the switch statement like this:
```php

switch ($filter) {
    case 1:
    // do something
        break;
    case 2:
    // do something
        break;
}

For more clarity and readability of the code. :smile: :+1: