# Go upwards the path until the basename is equal
# to your argument.
function cdp {
  CURRENT=$(basename $PWD)
  until [ $CURRENT == "$*" ]; do
    cd ..
    CURRENT=$(basename $PWD)
  done
}

_cdp() {
  local cur=${COMP_WORDS[COMP_CWORD]}
  COMPREPLY=( $(compgen -W "${PWD//\// }" $cur) )
}
complete -F _cdp cdp