The following sample works for me, with res.cls and using pdflatex, bibtex and 2xpdflatex; however, it gives the error ! LaTeX Error: Lonely \item--perhaps a missing list environment. Is this something that can be avoided, or is it related to my own latex version?
\let\latexnofiles\nofiles
\let\nofiles\relax
\documentclass[margin,line]{res}
\usepackage[pdftex,pdftitle={zzz}]{hyperref}
\usepackage{bibentry}
\begin{document}
\bibliographystyle{alpha}
\nobibliography{mybiblio.bib}
\begin{resume}
\section{abc}
\begin{itemize}
\item \bibentry{some item}
\end{itemize}
\end{resume}
\end{document}
Note that it is not related to the res class, as
\documentclass[12pt]{article}
\usepackage[pdftex,pdftitle={zzz}]{hyperref}
\usepackage{bibentry}
\begin{document}
\bibliographystyle{alpha}
\nobibliography{mybiblio.bib}
\section{abc}
\begin{itemize}
\item \bibentry{someitem}
\end{itemize}
\end{document}
gives the same error
bibentrywithoutnatbib, which is needed ifhyperrefis loaded, see the question I marked this one a duplicate of. – egreg Sep 08 '14 at 13:16