How to make self style enumerate list?

Question

I would like to have a list like this:

a) Aha
b) Bla
Look at a) and b).

I write some code like this

\documentclass{article}

\renewcommand{\theenumi}{\alph{enumi}}
\renewcommand{\labelenumi}{\theenumi)}
%\makeatletter
%\renewcommand{\p@enumi}{\theenumi)}
%\makeatother
\usepackage{hyperref}
\begin{document}
\begin{enumerate}
  \item \label{item:1} Aha
  \item \label{item:2} Bla
\end{enumerate}
Look at~\ref{item:1} and~\ref{item:2}.
\end{document}

It works fine except the printed ref is not correct. I have tried the commented code, however it does not work.

Answer 1

The enumitem package provides this functionality by default - specifying different label and ref components (if needed) for list items. Here's your minimal example moulded into an enumitem interface:

\documentclass{article}
\usepackage{enumitem}% http://ctan.org/pkg/enumitem
\usepackage{hyperref}% http://ctan.org/pkg/enumitem
\begin{document}
\begin{enumerate}[label={\alph*)},ref={\alph*)}]
  \item \label{item:1} Aha
  \item \label{item:2} Bla
\end{enumerate}
Look at~\ref{item:1} and~\ref{item:2}.
\end{document}​

The label key specifies how the enumeration will print within the list, while ref indicates the style of printing when using \ref.

Global settings is also possible via

\setlist[enumerate,1]{label={\alph*)},ref={\alph*)}}

which sets key-value pairs for enumerate at level 1. See the enumitem documentation for more details and setting possibilities.

Answer 2

Your code works if the label key and the reference key are equal ;-) and the bracket is set inside the macro theenumi

\documentclass{article}

\renewcommand{\theenumi}{\alph{enumi})}
\renewcommand{\labelenumi}{\theenumi}
\makeatletter
%\renewcommand{\p@enumi}{}
\makeatother
\usepackage{hyperref}
\begin{document}
\begin{enumerate}
  \item \label{item:1} Aha
  \item \label{item:2} Bla
\end{enumerate}
Look at~\ref{item:1} and~\ref{item:2}.
\end{document}