_ct()
{
    local abs_path="$( pwd )"
    local test_target=""
    local target=""

    while [ \( ! "/" = $abs_path \) -a \( -z "$target" \) ]; do
        test_target="$( basename "$abs_path" )"
        if [[ "$test_target" =~ ${COMP_WORDS[$COMP_CWORD]} ]]; then
            target="$test_target"
        else
            abs_path="$( dirname $abs_path )"
        fi
    done
    COMPREPLY=( $target )
} && complete -F _ct ct