\begin{table}[htbp!]
 \begin{minipage}[t]{\textwidth}
\begin{tabularx}{\textwidth}{|X|X|}
\hline
\relax  [hell]   &  Hello   \\
\hline
\relax  [there]  &  [here]  \\
\relax  [here]  &  [there]  \\
\hline
\end{tabularx}

\caption[]{[prova]}
\end{minipage}
\end{table}