Round brackets issue in Codeigniter

Hi,

I am working on Codeigniter project, I need to migrate whole database MySQL to SQL server, for that I am getting an issue in select query, I can see in SQL server round brackets are not supported around the table name, here is my Codeigniter query

$this->db->_protect_identifiers=false;
$this->db->select('*')->from('tb_card',false);
$this->db->where('company_id',$this->company_id,FALSE)->get()->row_array();
This select query generates below query

SELECT * FROM (tb_card) WHERE company_id = 27

You can see there are round brackets around the table name, I want to remove this, can anyone please help me to resolve this issue?

Thank you