How to use LaTeX template for SIAM papers?

This is new in the October 2013 version of the macros, which now include the hyperref package (but with the hard-coded drivers pdfmark and dvips -- which are synonymous, as far as I know). This makes the new version break with pdflatex.

If you would like to continue preparing your paper using pdflatex, you can change your local version of siamltex1213.cls by removing the dvips and pdfmark options from the hyperref call on line 797.

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EDIT: This is now fixed in the latest update (January 2016) of SIAM's macros.

Use latex -> dvips -> ps2pdf rather than pdflatex.