$data = array(
'title' => 'My title' ,
'name' => 'My Name' ,
'date' => 'My date'
);

$this->db->insert('mytable', $data);

// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date')

$data = array(
array(
'title' => 'My title' ,
'name' => 'My Name' ,
'date' => 'My date'
),
array(
'title' => 'My title1' ,
'name' => 'My Name1' ,
'date' => 'My date1'
)
);

$this->db->insert_batch('mytable', $data);

// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date')，('My title1', 'My name1', 'My date1')