User:Angrytoast/monobook.js

function AppendCategoryTreeToSidebar { try { var node = document.getElementById( "p-tb" ) .getElementsByTagName('div')[0] .getElementsByTagName('ul')[0]; var aNode = document.createElement( 'a' ); var liNode = document.createElement( 'li' ); aNode.appendChild( document.createTextNode( 'CategoryTree' ) ); aNode.setAttribute( 'href', 'w:en:Special:CategoryTree' ); liNode.appendChild( aNode ); liNode.className = 'plainlinks'; node.appendChild( liNode ); } catch(e) { // lets just ignore what's happened return; } } $( AppendCategoryTreeToSidebar );