First, you can't "translate" into hiragana because hiragana is a syllabary, not a language. The word you're looking for is "transliterate." Second, English words (and most foreign words) almost invariably get transliterated into katakana, not hiragana. Third, you probably can't find anything because "(The) Ghost in the Shell" is not the original name of the series in Japanese. It was made up to be easier and catchier to English ears than "Mobile Armored Riot Police" or whatever else it would be translated as. Forth, there is no set way to transliterate some words. For example, "the" might become ザ (za), ゼ (ze), or ジ (ji).
Now that I've gotten that out.
Katakana
ザ・ゴースト・イン・ザ・シェル
Hiragna
ざ・ごーすと・いん・ざ・しぇる