\documentclass[a4paper,fleqn,10pt,oneside]{book}


\usepackage{cite}
%\usepackage[square,numbers,sort&compress]{natbib}


\usepackage{hyperref}
\usepackage{xepersian}
\settextfont{B Zar}
\setlatintextfont{Times New Roman}

\renewcommand*{\citedash}{-}

\makeatletter
\def\@cite#1#2{[{#1\if@tempswa ,~#2\fi}]}
\makeatother

\begin{document}
سلام
\cite{a1,a,b,c,e}. 
\begin{thebibliography}{99}
\bibitem{a1} شششش.
\bibitem{b1}  ذذذذذ.	
\bibitem{a} الف.
\bibitem{b}  ب.
\bibitem{c}  ج.
\bibitem{d}  د.
\bibitem{e}  ای.
\end{thebibliography} 
\end{document}