eval in smarty/codeigniter

I am trying to use one of CodeIgniter functions with smarty which the variable name is Dynamic.

normally the function is called like this :

{set_value(aaa, $f_aaa} <br>

but in my code aaa is replaced with a dynamic value

first part is easy :

{set_value($row->Field, $f_aaa} <br>

but I don't know how to use eval in smarty for this situation .

it should call the function with a loop (ex with following input/variable)

{set_value(name, $f_name} 

{set_value(address, $f_address} 

edit: I forgot to say PHP's native eval function is not working inside smarty .. it's showing following error :

unknown function "eval"' 

eval is not a function - it is language construct and it cannot be called the way smarty is calling normal functions.

If you want to use CI helper inside Smarty, take a look at this Smarty plugin

https://github.com/fadillzzz/Smarty-CI-Helper/

It'll give you the ability to call any CI helper functions from the Smarty templates using the Smarty syntax

have you used {php} tag.