\documentclass[a4paper, oneside, 10pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage[czech]{babel}
\usepackage[unicode]{hyperref}
\begin{document}

\section{\texorpdfstring{LocalLink}{LocalLink}}
\label{sec:locallink}

This section (\autoref{sec:locallink})

\section{\texorpdfstring{Another link}{Another link}}
\label{sec:another_link}

This section (\autoref{sec:another_link})

\href{http://www.dokuwiki.org/Interwiki}{Interwiki}

\href{file:///P:/Manuals/UserManual.pdf}{User Manual}

\href{\\\\server\\share}{Windows share}

\end{document}