How can I simulate in PSpice the model LM13700?
This does not look like the same model I got from TI website.

Here is the header:

*//////////////////////////////////////////////////////////////////////
* (C) National Semiconductor, Inc.
* Models developed and under copyright by:
* National Semiconductor, Inc.  

*/////////////////////////////////////////////////////////////////////
* Legal Notice: This material is intended for free software support.
* The file may be copied, and distributed; however, reselling the 
*  material is illegal

*////////////////////////////////////////////////////////////////////
* For ordering or technical information on these models, contact:
* National Semiconductor's Customer Response Center
*                 7:00 A.M.--7:00 P.M.  U.S. Central Time
*                                (800) 272-9959
* For Applications support, contact the Internet address:
*  amps-apps@galaxy.nsc.com

* \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\            
* LM13700 Dual Operational Transconductance Amplifier                 
* \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\                 
*
*                   Amplifier Bias Input
*                   | Diode Bias
*                   | | Positive Input
*                   | | | Negative Input
*                   | | | | Output
*                   | | | | | Negative power supply
*                   | | | | | | Buffer Input
*                   | | | | | | | Buffer Output
*                   | | | | | | | | Positive power supply
*                   | | | | | | | | |
.SUBCKT LM13700/NS  1 2 3 4 5 6 7 8 11
* snip


I've got the feeling you got the mod file from some second hand source, like a supplier. This is not intrinsically bad, but always check the manufacturer's website.

Another possibility is that your spice simulator strips the 'unnecessary' lines of a mod file after you import it, where unnecessary might mean 'everything that comes before the .SUBCKT statement. This strucks me as quite odd and almost always unwanted behavior, but it seems that it is precisely what did happen here.

The "pipes 'n spaces" notation is widely used in .mod files, I checked on TI website exactly because your file seemed to miss something.