How to insert corporate details into database

Try using set on the array.

PHP Code:

public function update_product($product)
{
    $this->db->where('user_name', $lcuser);
    $data = array('temp_1' => $product);
    $this->db->set($data);
    $this->db->update('tbl_members', $data);
} 


Would it help if the number of the column was included?