Escape quotes/strip slashes.

[eluser]xzela[/eluser]
Try using an array and see if that helps:

Code:

function insert_park() {
  $fields = array();

  $fields['park_name'] = $_POST['park_name'];
  $fields['park_description '] = $_POST['park_description'];
  $fields['park_website'] = $_POST['park_website'];
  $fields['park_addr1'] = $_POST['park_addr1'];
  $fields['park_city'] = $_POST['park_city'];
  $fields['park_state'] = $_POST['park_state'];
  $fields['park_zip'] = $_POST['park_zip'];
  $fields['park_visible'] = $_POST['park_visible'];

  $this->db->insert('parks_tbl', $fields);
        
}