How to split ul into multiple columns

ul multi column

ul{
width: 300px;
overflow: hidden;
}

ul li{
float: left;
width: 75px;
}

 

HTML Email with Codeigniter

$this->email->to( 'abc@gmail.com' );
$this->email->subject( 'Test' );
$this->email->message( $this->load->view( 'email/message', $data, true ) );
$this->email->send();