Assalamualaikum Warahmatullahi Wabarakatuh...
 
tanya bagaimana cara delete tabel yang berelasi di codeigniter

Assalam,.. cuma pake query delete seperti baisanya mas, cuma beda direlasi saja, contoh :
SELECT * FROM table1 a JOIN table2 b ON a.id_table=b.id_table where b.nama_field='$_GET[delete]'