Data copy from 1 table to another with the foreign key

Question

I have an issue in insertion of records from one table to another the tables schema is same

 

Table 1

 

Id       Parent Id       Text

11          Null              A

12          Null              B

13          11                 C

14          11                 D

15          13                 E

 

The record should be inserted in this format, According to my knowledge I have to copy the foreign key relation not the identities of it.

 

Table 2

 

Id       Parent Id       Text

31          Null             A

32          Null             B

33          31                C

34          31                D

35          33                E