Sidebar em forma de menu Acordeon

 Vá até o HTML de seu blog e procure pelo código:

</head>

Cole então o próximo código acima dele.

<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js' type='text/javascript'/>
<script type='text/javascript'>
var sidebarnameacc1=&quot;sidebar&quot;;
var accordionside1=true;
var sideshow1=new Array(0,0);
var sidebarnameacc2=&quot;sidebar2&quot;;
var accordionside2=false;
var sideshow2=new Array(0,0);
</script>
<script type='text/javascript'>
//<![CDATA[
/* 
Javascript Based on Redux http://www.i-marco.nl

Widget for blogger by www.abu-farhan.com
copyright by Abu Farhan
Dont edit without permission from the Copyright owner
*/

eval(function(p,a,c,k,e,r){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)r[e(c)]=k[c]||e(c);k=[function(e){return r[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('g q=J.K;6(q.L("M.N")==-1){g $0=O.P()}d r(){$0("#"+7+" .2-4").s();$0("#"+7+" .2 8").t("u","v");w(i x o){$0("#"+7+"  .2-4:h("+o[i]+")").y();$0("#"+7+"  .2 8:h("+o[i]+")").j("5")}$0("#"+7+" .2 8").z(d(){6(Q){g a=$0(3).e();6((a.9(".2-4"))&&(a.9(":f"))){$0(3).e().k("b");$0(3).l("5");m n}6((a.9(".2-4"))&&(!a.9(":f"))){$0("#"+7+" .2-4:f").A("b");$0("#"+7+" 8").B("5");a.C("b");$0(3).j("5");m n}}D{$0(3).e().k("b");$0(3).l("5")}})}6(E(7)!="F"){$0(G).H(d(){r()})}d I(){$0("#"+c+" .2-4").s();$0("#"+c+" .2 8").t("u","v");w(i x p){$0("#"+c+"  .2-4:h("+p[i]+")").y();$0("#"+c+"  .2 8:h("+p[i]+")").j("5")}$0("#"+c+" .2 8").z(d(){6(R){g a=$0(3).e();6((a.9(".2-4"))&&(a.9(":f"))){$0(3).e().k("b");$0(3).l("5");m n}6((a.9(".2-4"))&&(!a.9(":f"))){$0("#"+c+" .2-4:f").A("b");$0("#"+c+" 8").B("5");a.C("b");$0(3).j("5");m n}}D{$0(3).e().k("b");$0(3).l("5")}})}6(E(c)!="F"){$0(G).H(d(){I()})};',54,54,'jx||widget|this|content|headactive|if|sidebarnameacc1|h2|is||normal|sidebarnameacc2|function|next|visible|var|eq||addClass|slideToggle|toggleClass|return|false|sideshow1|sideshow2|home_page_tab|initMenu1|hide|css|cursor|pointer|for|in|show|click|slideUp|removeClass|slideDown|else|typeof|undefined|document|ready|initMenu2|location|href|indexOf|blogger|com|jQuery|noConflict|accordionside1|accordionside2'.split('|'),0,{}))
//]]>

Para dar estilo, copie o próximo código e cole antes de: ]]><b:skin>

.sidebar h2.headactive {

background-color: #d77218;
-moz-border-radius-topleft: 4px;
-moz-border-radius-topright: 4px;
}
.sidebar2 h2.headactive {
background-color: #d77218;
-moz-border-radius-topleft: 4px;
-moz-border-radius-topright: 4px;

}

Fonte: http://templateseacessorios.blogspot.com