scratch.tex

\documentclass{article}

\usepackage{tabularx}

\newenvironment{tableenv}[0]{%
  \tabularx{1\linewidth}{|l|X|}%
}{%
  \endtabularx%
}

\newenvironment{rowenv}[1]{%
  #1 & \begin{itemize}%
}{%
  \end{itemize}%
}

\begin{document}

\begin{tableenv}
  \begin{rowenv}{foo}
    \item bar
    \item baz
  \end{rowenv}
\end{tableenv}

\end{document}