I want to a web server which have a cgi interface

Excalibur is a line of development boards that Altera sells. The Excalibur chip contains an FPGA, SRAM, and an ARM9 processor. You can find out everything about them on Altera's website: if you go to "Devices" it is low down on the left bar, where it says "Embedded Processors". application note 285 (http://www.altera.com/literature/an/an285.pdf) gives you the details, and the design files for the example (http://www.altera.com/literature/an/an285.zip) are available.

It might be a significant amount of work to make this work for boards without a hard core, though, especially if you program the board with a design that doesn't include the webserver. One approach would be to keep the webserver code in Flash so you can get back to it with just a reset.